LCD TV Repair Tips and tricks
Bush, Acer, Changhong, Sony, Philips, Goodmans, Sharp, JVC and more.
Wharfedale LCD3210AF
Chassis 17MB116 LCD TV Starts-up, backlight came after that switches off
immediately.
Starts-up, backlight came after that switches off immediately. Runs ok when inverter board is externally supplied with 24v.
> Replace C877 and C878 (15nf/630v) between heatsink of switching transistor and larger transformer on the primary side of the PSU.
Starts-up, backlight came after that switches off immediately. Runs ok when inverter board is externally supplied with 24v.
> Replace C877 and C878 (15nf/630v) between heatsink of switching transistor and larger transformer on the primary side of the PSU.
Vizio VO42LFHDTV10A LCD TV
Green distortion in the picture.
> If PSU secondary side voltages OK. Check & clean contacts of ribbon cables coming from control board.
GOODMANS GTV32W22HD AVZOOO Chassis LM
Dark picture. OSD bounces
> Replace C2042 and C2044 (680uf) in PSU.
Green distortion in the picture.
> If PSU secondary side voltages OK. Check & clean contacts of ribbon cables coming from control board.
GOODMANS GTV32W22HD AVZOOO Chassis LM
Dark picture. OSD bounces
> Replace C2042 and C2044 (680uf) in PSU.
Changhong
LT32700 LCD TV
TV stuck on standby mode.
After the AC power supply to the TV, standby LED light on with yellow color. When press the power on switch or remote control power on, the TV still remain the same yellow color LED light and can’t start-up.
> Check the PSU output, their standby 5V is present but no any POWER_ON signal present. Checking their main board voltage regulator IC output and found U1 (LM1084-2.5) output voltage as 4V! Actually it should be output 2.5V instead of 4V. After replace U1 the TV is working.
TV stuck on standby mode.
After the AC power supply to the TV, standby LED light on with yellow color. When press the power on switch or remote control power on, the TV still remain the same yellow color LED light and can’t start-up.
> Check the PSU output, their standby 5V is present but no any POWER_ON signal present. Checking their main board voltage regulator IC output and found U1 (LM1084-2.5) output voltage as 4V! Actually it should be output 2.5V instead of 4V. After replace U1 the TV is working.
Changhong
LT2612 LCD TV (T-con: SVA 260PW023S)
No Display and the screen full of Vertical color lines
> Normally this type of TV symptom was causing by the T-CON board or LCD panel. This LCD Tv using SVA 260PW023S T-CON board. Check the T-con board Vcc voltage input had 5V, and the AVDD had 3.3V. The lcd panel driving voltage VGH & VGL are nothing. Suspect their DC-DC circuit lines having problem. Check the VGH line with GND with ohm range, it had 300 ohm only. But VGL line with GND had above 36K ohm! So suspect the VGH circuit line filter capacitor leakage. Found three SMD chocolate color filter caps on the VGH line and two of three filter caps were leakage, another good one got 3.3uF. Because of they are three same size and color filter caps, so using one normal electrolytic capacitor 10uF/50V to replace it. Power on the TV their display is back to normal.
No Display and the screen full of Vertical color lines
> Normally this type of TV symptom was causing by the T-CON board or LCD panel. This LCD Tv using SVA 260PW023S T-CON board. Check the T-con board Vcc voltage input had 5V, and the AVDD had 3.3V. The lcd panel driving voltage VGH & VGL are nothing. Suspect their DC-DC circuit lines having problem. Check the VGH line with GND with ohm range, it had 300 ohm only. But VGL line with GND had above 36K ohm! So suspect the VGH circuit line filter capacitor leakage. Found three SMD chocolate color filter caps on the VGH line and two of three filter caps were leakage, another good one got 3.3uF. Because of they are three same size and color filter caps, so using one normal electrolytic capacitor 10uF/50V to replace it. Power on the TV their display is back to normal.
Changhong LT24720FX LCD TV
Display poor image with whitish tail or ghosting
> Normally this type of symptom was causing by the T-CON board or LCD panel. So starting testing their T-CON board voltage and found that VGH voltage has 2.3V only. The correct VGH voltage for this T-Con board should be about 25V. At the same time found a burnt component on the T-con and the location is R100. That’s mean it is a burnt resistor and can’t saw any value there. Using multimeter ohm range to checking the R100 pin ohm values to GND (ground) is about +/- 500K ohm. This is let us know, the R100 position not because of other components short circuit and causing it burnt. Use a 1M ohm variable resistor (VR), starting from the highest ohm first and then slowly decreases the ohm values until the VGH reach 25V and the display also change to normal. So check on that VR and found it is about 100K ohm, after that changed a SMD resistor with values 100K ohm to R100. The VGH line got 25V now and the display image also back to normal now. The TV problem solved.
Konka LC32ES62 LCD TV
TV Randomly Can’t Start-up, LED light blinking
non-stop with Red and Green color). Or when TV heat the backlight flickering
till no backlight/cut off and the sound remain ok.
> This TV is using the IP (Inverter Power Supply board) board with LG LCD Panel. Find a resistor R756 in IP board and modify it to 3.3K ohm and problem solved.
BUSH LCD32TV005HD: BUSH LCD32TV005HD APH000 Chassis BEKO LM LCD TV
> This TV is using the IP (Inverter Power Supply board) board with LG LCD Panel. Find a resistor R756 in IP board and modify it to 3.3K ohm and problem solved.
BUSH LCD32TV005HD: BUSH LCD32TV005HD APH000 Chassis BEKO LM LCD TV
After TV on few seconds, then the TV off
again.
Picture appears for a few seconds after switch on, after that the TV switches off again.
> Check C2042 and C2044 (both 680uf/35v) in PSU for capacity loss.
BUSH LCD32TV005HD: No Picture and no back light. Front controls react and remote control does not.
BUSH LCD32TV005HD APH000 Chassis BEKO LM LCD TV
No Picture and no backlight. The front controls was working but remote control does not
> Replace IR receiver (short circuit).
JVC LT32DX7B: No functions after lightning strike
JVC LT32DX7B LCD TV
Symptom: No functions after lightning strike.
The primary voltage 300v is present. But secondary voltage output was only 21 volt. Replace standby transformer T9201.
Sharp LC32P55E: Red LED appears for a seconds, relay clicks then dead.
Sharp LC32P55E LCD TV: Red LED appears for a seconds, relay clicks then dead.
> The resistor R751 blown. Replace IC704 & R751.
Sharp LC32P55E: Dead after start-up. Bang-noise head before
Dead after start-up. Bang-noise head before.
> Replace R751 (0.1R/2W), IC704, D762, D725 and C725 (470pF/3K) in PSU.
Philips Chassis BJ3.0E LA: Switches off for a second or two intermittently
Philips Chassis BJ3.0E LA LCD TV
Switches off for a second or two intermittently. Relay clicks and standby LED remains green. Switches off intermittently with green LED on, no sound or no picture.
> Check the 27MHz KDS quartz crystal (SSB, item 1H00). If all yellow marked crystals bearing with a "5E", "5J" or "5K" batch number direct replace it. Also replace all the silver marked crystals bearing with a "6D" batch number.
ACER AL2671W LCD TV
Dead.
> Replace power supply IC (TNY264PN) and resistor R60 (10R/0.33W, NFR type).
ACER AL2671W: No start-up. LED is orange
No start-up. LED is orange.
> When C380 unsuccessfully replaced. Standby PSU functions and standby 5V present. The voltage appears at pin “PSON” in the PSU after switch on but PSU does not start. Actually they are three 330K SMD resistors in series in the PSU which supply voltage for DLA001. Check if resistors are high resistive.
Bush IDLCD26TV05HD: No backlight and no picture. Sound ok and can be intermittently
Bush IDLCD26TV05HD Chassis L9 (Beko) LCD TV
No backlight and no picture. Sound ok and can be intermittently.
> Replace C512, C513 (both 1000uF/35v) and C519 (220uF/35v) in PSU. Also a 1000uf/16v capacitor on the signals board on the far right-hand side, near the top.
SONY KDL40U2000 with SE1 Chassis LCD TV. No start-up, red LED flashes 3 times.
> TV has slow start-up before this symptom occurred. When check standby 5V ok and PSU is heat sensitive. Check and replace the C6055 (47uf/25v) in G2 supply it will solve the problem.
BUSH LCD32TV022HD: Intermittently no start-up or dead after a few hours
BUSH LCD32TV022HD with 17MB15 Chassis LCD TV intermittently no start-up or dead after a few hours.
> The PSU replaced and EEPROM IC resoldered, but on help. Try to resolder IC220 (SDA5550) and IC224 on main board the TV back to normal.
EVESHAM ALQEM37SX: No start-up, the TV screen lights up, then switches back to standby mode
EVESHAM ALQEM37SX with 17MB15 Chassis LCD TV
No start-up, the TV screen lights up, then switches back to standby mode.
> Check or direct replace the C877 and C878 on PSU board for open circuits. Sometime these caps will check good, but would breaks down under load.
Grundig GULENAR32HDIP with Chassis L9 LCD TV: Stuck in standby mode, LED light is blue color.
> The blue LED always stays on, even when appliance is on standby mode. Capacitor C931 (1000uF) replaced but appliance is still dead with 12V and 24V ok. Check and replace diode D300 on the right-hand side, on mid -top of the main board.
ACER AL2671W: No start-up. LED is orange
Acer AL2671W LCD TV
No start-up. LED is orange.
> Check C380 (100uf.16v) under heatsink, next to U42 and U61 on signal PCB for capacity loss.
Sony KDL32U2000: No Picture
Sony KDL32U2000 Chassis SE1 LCD TV
No Picture
> Check SMD fuse CP101P on LVDS board. The LVDS board is behind the BDT board.
SONY KDL32S2010E: Switches to standby for a short while, then back again
SONY KDL32S2010E Chassis WAX2 LCD TV
Switches to standby for a short while, then back again
> Replace standby push button on user control, has contact resistance.
Philips 32PF3320/10: "F" is displayed on screen
Philips 32PF3320/10 Chassis LC4.5 EAA LCD TV
"F" is displayed on screen
> TV is in factory mode. To quit the factory mode, press both "VOLUME" "-" keys and "PROGRAM" "-" for 5 seconds simultaneously.
LG 32LC56: Picture divided into several parts. Distorted picture
LG 32LC56 LCD TV
Picture divided into several parts. Distorted picture
> Replace T-CON board (Part Number: 218394).
LG 32LC56ZC: No start-up. Standby LED flashes from red to green
LG 32LC56ZC LCD TV
No start-up. Standby LED flashes from red to green
> Replace C202, C206, C217 and C218 (2200uf/10v all), and C226 (470uf/25v).
GOODMANS GTV26WLCD: Shuts down and LED blinks
GOODMANS GTV26WLCD LCD TV
Shuts down and LED blinks
> Replace C877 and C878 (both 15nf/630V) near heatsink, at top left corner of PSU
BUSH LCD26TV006HDX: No display. Flashing standby light
BUSH LCD26TV006HDX LCD TV
No display. Flashing standby light.
> The capacitor C315 (1000uF/25v) is supplied higher rated, and is a little bigger so use longer leads don't fit close to board. Be careful when soldering you don't accidentally remove the tiny surface mount resistors on back of board.
Hitachi 37LD6600: No sound or intermittent sound
Hitachi 37LD6600, 37LD6600A LCD TV
No sound or intermittent sound
Pins of headphone socket touching the chassis.
> Trim the pins of the Headphone socket.
Hitachi 37LD6600: MECHANICAL NOISE FROM SCREEN ONLY IN CINEMA MODE
Hitachi 37LD6600, 37LD6600A LCD TV.
MECHANICAL NOISE FROM SCREEN ONLY IN CINEMA MODE
High back light setting on Cinema mode.
Backlight settings are different for each mode :
DYNAMIC: 00
NATURAL: 50
CINEMA : 100
> Reduce backlight settings in Cinema mode from 100 to 59 as follows.
Enter Service Mode with the remote control,
PRESS MENU; 4725 OR 1267 OR 1461 (there are 3 different software versions, only one code will work)
Service Menu will appear, Select PIC ADJUST and enter with VOL+
A second service menu will appear, the bottom adjustment in the menu is Back Light setting and will be set to 100.
From the Mode Heading select CINEMA mode.
Select Back Light and reduce the setting to 59.
To memorize and exit Service Mode press Standby.
Hitachi 32LD7200: Distorted Sound/Audio
Distorted Sound/Audio
Sound is distorted when the set is first switched on. After a while the fault clears and the set works normally.
> Replace Joint PWB. P/N: TP01336.
Hitachi 32LD7200: MECHNICAL NOISE FROM SCREEN IN DYNAMIC MODE
Low back light setting on Dynamic mode.
Backlight settings are different for each mode :
DYNAMIC : 12
NATURAL : 15
CINEMA : 10
Cure/Solutions: Increase backlight settings in Dynamic mode from 12 to 20
If similar noise problem occurs on other modes, adjust backlight levels to the position in which noise becomes minimum..
ADJUSTMENT
Backlight level can be adjusted in USER menu only.
Select Menu => Picture => Backlight => and adjust as necessary.
Hitachi 32LD6600: No picture, but sound ok
Hitachi 32LD6600_A_B_C LCD T V
No picture, but sound ok.
> Dry joints on components S627 and S629 near connector PL308 on the main board.
Cure/Solutions: Resolder components S627 and S629 and also check other components for dry joints near the connector.
Hitachi 32LD6200: Unit does not switch on or fails to power on
Hitachi 32LD6200_A_B_C LCD TV
Unit does not switch on or fails to power on
Unit does not work, standby LED not lighting.
Working of Pixelworks controller IC21 depends on ambient temperature. If the IC is heated externally the unit starts to work normally.
> Replace Ferrite bead L500 and L501 with a jumper wire.
Hitachi 32LD6200: Set fails to power on/switch on
Model/s: Hitachi 32LD6200_A_B_C LCD TV
Symptom: Set fails to power on/switch on.
If MB11-6 Main board is used instead of the original Main board MB11-2 the unit won't switch on.
Unit switches off immediately and a clicking noise comes from the Power Regulator Board.
> Replace the LVDS cable (p/n: VS30041693) and add a 47uF(p/n: VS30000396, CAP EL47UF16V) electrolytic capacitor to Power Regulation Board .
Hitachi: Picture Display Problem
Model/s: Hitachi 32LD6200_A_B_C, 32LD6600_A_B_C LCD TV
Symptom: Picture Display Problem
Cause: Various picture problems can be caused by poor connection of the LVDS cable on connector PL103 on the Main board.
> Remove LVDS cable from connector PL103 and reinsert carefully.
Make sure both end of the LVDS cable are inserted properly between PL103 and the display panel.
Sharp: The Sharp LCD TV still under protection mode?
Model/s: SHARP LCD TV Repair tips
Symptom: The Sharp LCD TV still under protection mode?
The Sharp LCD TV always have the protection mode come out. Normally, the repairer will first check the inverter board, after that power board/PSU, if still can't get any result, then they will check the signal board or mainboard. Even you change the inverter or PSU board, the lcd TV still under protection mode. Sometime, the lcd TV has been fixed by the repairer, but they don't know the TV still remember the protection mode inside the memory. So, now you need to know how to clear this protection error inside the lcd TV memory.
> Press & hold the CHANNEL DOWN & VOLUME UP buttons, then ON the LCD TV. The LCD TV Protection Error has been clear & solve the TV problem.
Hyundai: Slow start-up
Model/s: Hyundai Imagequest HQL260WR LCD TV
Symptom: Slow start-up
> Replace capacitor C109, C110 and C111 (all 1000uf/35v). Also check SMD resistor R56 and R57(both 22K) for dry joints.
Hyundai: Shuts down after a few minutes
Model/s: Hyundai Imagequest HQL260WR LCD TV
Symptom: Shuts down after a few minutes
Three 1000uf electronic capacitors in PSU replaced unsuccessfully.
> Change optocoupler IC PC102-2.
Picture appears for a few seconds after switch on, after that the TV switches off again.
> Check C2042 and C2044 (both 680uf/35v) in PSU for capacity loss.
BUSH LCD32TV005HD: No Picture and no back light. Front controls react and remote control does not.
BUSH LCD32TV005HD APH000 Chassis BEKO LM LCD TV
No Picture and no backlight. The front controls was working but remote control does not
> Replace IR receiver (short circuit).
JVC LT32DX7B: No functions after lightning strike
JVC LT32DX7B LCD TV
Symptom: No functions after lightning strike.
The primary voltage 300v is present. But secondary voltage output was only 21 volt. Replace standby transformer T9201.
Sharp LC32P55E: Red LED appears for a seconds, relay clicks then dead.
Sharp LC32P55E LCD TV: Red LED appears for a seconds, relay clicks then dead.
> The resistor R751 blown. Replace IC704 & R751.
Sharp LC32P55E: Dead after start-up. Bang-noise head before
Dead after start-up. Bang-noise head before.
> Replace R751 (0.1R/2W), IC704, D762, D725 and C725 (470pF/3K) in PSU.
Philips Chassis BJ3.0E LA: Switches off for a second or two intermittently
Philips Chassis BJ3.0E LA LCD TV
Switches off for a second or two intermittently. Relay clicks and standby LED remains green. Switches off intermittently with green LED on, no sound or no picture.
> Check the 27MHz KDS quartz crystal (SSB, item 1H00). If all yellow marked crystals bearing with a "5E", "5J" or "5K" batch number direct replace it. Also replace all the silver marked crystals bearing with a "6D" batch number.
ACER AL2671W LCD TV
Dead.
> Replace power supply IC (TNY264PN) and resistor R60 (10R/0.33W, NFR type).
ACER AL2671W: No start-up. LED is orange
No start-up. LED is orange.
> When C380 unsuccessfully replaced. Standby PSU functions and standby 5V present. The voltage appears at pin “PSON” in the PSU after switch on but PSU does not start. Actually they are three 330K SMD resistors in series in the PSU which supply voltage for DLA001. Check if resistors are high resistive.
Bush IDLCD26TV05HD: No backlight and no picture. Sound ok and can be intermittently
Bush IDLCD26TV05HD Chassis L9 (Beko) LCD TV
No backlight and no picture. Sound ok and can be intermittently.
> Replace C512, C513 (both 1000uF/35v) and C519 (220uF/35v) in PSU. Also a 1000uf/16v capacitor on the signals board on the far right-hand side, near the top.
SONY KDL40U2000 with SE1 Chassis LCD TV. No start-up, red LED flashes 3 times.
> TV has slow start-up before this symptom occurred. When check standby 5V ok and PSU is heat sensitive. Check and replace the C6055 (47uf/25v) in G2 supply it will solve the problem.
BUSH LCD32TV022HD: Intermittently no start-up or dead after a few hours
BUSH LCD32TV022HD with 17MB15 Chassis LCD TV intermittently no start-up or dead after a few hours.
> The PSU replaced and EEPROM IC resoldered, but on help. Try to resolder IC220 (SDA5550) and IC224 on main board the TV back to normal.
EVESHAM ALQEM37SX: No start-up, the TV screen lights up, then switches back to standby mode
EVESHAM ALQEM37SX with 17MB15 Chassis LCD TV
No start-up, the TV screen lights up, then switches back to standby mode.
> Check or direct replace the C877 and C878 on PSU board for open circuits. Sometime these caps will check good, but would breaks down under load.
Grundig GULENAR32HDIP with Chassis L9 LCD TV: Stuck in standby mode, LED light is blue color.
> The blue LED always stays on, even when appliance is on standby mode. Capacitor C931 (1000uF) replaced but appliance is still dead with 12V and 24V ok. Check and replace diode D300 on the right-hand side, on mid -top of the main board.
ACER AL2671W: No start-up. LED is orange
Acer AL2671W LCD TV
No start-up. LED is orange.
> Check C380 (100uf.16v) under heatsink, next to U42 and U61 on signal PCB for capacity loss.
Sony KDL32U2000: No Picture
Sony KDL32U2000 Chassis SE1 LCD TV
No Picture
> Check SMD fuse CP101P on LVDS board. The LVDS board is behind the BDT board.
SONY KDL32S2010E: Switches to standby for a short while, then back again
SONY KDL32S2010E Chassis WAX2 LCD TV
Switches to standby for a short while, then back again
> Replace standby push button on user control, has contact resistance.
Philips 32PF3320/10: "F" is displayed on screen
Philips 32PF3320/10 Chassis LC4.5 EAA LCD TV
"F" is displayed on screen
> TV is in factory mode. To quit the factory mode, press both "VOLUME" "-" keys and "PROGRAM" "-" for 5 seconds simultaneously.
LG 32LC56: Picture divided into several parts. Distorted picture
LG 32LC56 LCD TV
Picture divided into several parts. Distorted picture
> Replace T-CON board (Part Number: 218394).
LG 32LC56ZC: No start-up. Standby LED flashes from red to green
LG 32LC56ZC LCD TV
No start-up. Standby LED flashes from red to green
> Replace C202, C206, C217 and C218 (2200uf/10v all), and C226 (470uf/25v).
GOODMANS GTV26WLCD: Shuts down and LED blinks
GOODMANS GTV26WLCD LCD TV
Shuts down and LED blinks
> Replace C877 and C878 (both 15nf/630V) near heatsink, at top left corner of PSU
BUSH LCD26TV006HDX: No display. Flashing standby light
BUSH LCD26TV006HDX LCD TV
No display. Flashing standby light.
> The capacitor C315 (1000uF/25v) is supplied higher rated, and is a little bigger so use longer leads don't fit close to board. Be careful when soldering you don't accidentally remove the tiny surface mount resistors on back of board.
Hitachi 37LD6600: No sound or intermittent sound
Hitachi 37LD6600, 37LD6600A LCD TV
No sound or intermittent sound
Pins of headphone socket touching the chassis.
> Trim the pins of the Headphone socket.
Hitachi 37LD6600: MECHANICAL NOISE FROM SCREEN ONLY IN CINEMA MODE
Hitachi 37LD6600, 37LD6600A LCD TV.
MECHANICAL NOISE FROM SCREEN ONLY IN CINEMA MODE
High back light setting on Cinema mode.
Backlight settings are different for each mode :
DYNAMIC: 00
NATURAL: 50
CINEMA : 100
> Reduce backlight settings in Cinema mode from 100 to 59 as follows.
Enter Service Mode with the remote control,
PRESS MENU; 4725 OR 1267 OR 1461 (there are 3 different software versions, only one code will work)
Service Menu will appear, Select PIC ADJUST and enter with VOL+
A second service menu will appear, the bottom adjustment in the menu is Back Light setting and will be set to 100.
From the Mode Heading select CINEMA mode.
Select Back Light and reduce the setting to 59.
To memorize and exit Service Mode press Standby.
Hitachi 32LD7200: Distorted Sound/Audio
Distorted Sound/Audio
Sound is distorted when the set is first switched on. After a while the fault clears and the set works normally.
> Replace Joint PWB. P/N: TP01336.
Hitachi 32LD7200: MECHNICAL NOISE FROM SCREEN IN DYNAMIC MODE
Low back light setting on Dynamic mode.
Backlight settings are different for each mode :
DYNAMIC : 12
NATURAL : 15
CINEMA : 10
Cure/Solutions: Increase backlight settings in Dynamic mode from 12 to 20
If similar noise problem occurs on other modes, adjust backlight levels to the position in which noise becomes minimum..
ADJUSTMENT
Backlight level can be adjusted in USER menu only.
Select Menu => Picture => Backlight => and adjust as necessary.
Hitachi 32LD6600: No picture, but sound ok
Hitachi 32LD6600_A_B_C LCD T V
No picture, but sound ok.
> Dry joints on components S627 and S629 near connector PL308 on the main board.
Cure/Solutions: Resolder components S627 and S629 and also check other components for dry joints near the connector.
Hitachi 32LD6200: Unit does not switch on or fails to power on
Hitachi 32LD6200_A_B_C LCD TV
Unit does not switch on or fails to power on
Unit does not work, standby LED not lighting.
Working of Pixelworks controller IC21 depends on ambient temperature. If the IC is heated externally the unit starts to work normally.
> Replace Ferrite bead L500 and L501 with a jumper wire.
Hitachi 32LD6200: Set fails to power on/switch on
Model/s: Hitachi 32LD6200_A_B_C LCD TV
Symptom: Set fails to power on/switch on.
If MB11-6 Main board is used instead of the original Main board MB11-2 the unit won't switch on.
Unit switches off immediately and a clicking noise comes from the Power Regulator Board.
> Replace the LVDS cable (p/n: VS30041693) and add a 47uF(p/n: VS30000396, CAP EL47UF16V) electrolytic capacitor to Power Regulation Board .
Hitachi: Picture Display Problem
Model/s: Hitachi 32LD6200_A_B_C, 32LD6600_A_B_C LCD TV
Symptom: Picture Display Problem
Cause: Various picture problems can be caused by poor connection of the LVDS cable on connector PL103 on the Main board.
> Remove LVDS cable from connector PL103 and reinsert carefully.
Make sure both end of the LVDS cable are inserted properly between PL103 and the display panel.
Sharp: The Sharp LCD TV still under protection mode?
Model/s: SHARP LCD TV Repair tips
Symptom: The Sharp LCD TV still under protection mode?
The Sharp LCD TV always have the protection mode come out. Normally, the repairer will first check the inverter board, after that power board/PSU, if still can't get any result, then they will check the signal board or mainboard. Even you change the inverter or PSU board, the lcd TV still under protection mode. Sometime, the lcd TV has been fixed by the repairer, but they don't know the TV still remember the protection mode inside the memory. So, now you need to know how to clear this protection error inside the lcd TV memory.
> Press & hold the CHANNEL DOWN & VOLUME UP buttons, then ON the LCD TV. The LCD TV Protection Error has been clear & solve the TV problem.
Hyundai: Slow start-up
Model/s: Hyundai Imagequest HQL260WR LCD TV
Symptom: Slow start-up
> Replace capacitor C109, C110 and C111 (all 1000uf/35v). Also check SMD resistor R56 and R57(both 22K) for dry joints.
Hyundai: Shuts down after a few minutes
Model/s: Hyundai Imagequest HQL260WR LCD TV
Symptom: Shuts down after a few minutes
Three 1000uf electronic capacitors in PSU replaced unsuccessfully.
> Change optocoupler IC PC102-2.
LOGIK: No sound or picture.
The front controls light up & relay clicks.
Logik LCXW32HDI LCD TV
No sound or picture. The front controls light up & relay clicks.
> Check or replace R65 (2M) in U3 PSU for open circuit.
Panasonic: Enter Service Mode.
Panasonic TX-32LED7FM Chassis GLP22M LCD TV
Enter Service Mode.
1. Press F button to access volume setting.
2. Press V- button on set until volume reaches minimum.
3. While still holding V- button press 0 button three times on remote control.
4. Press 1 and 2 buttons to scroll through the menu.
5. Press 3 and 4 buttons to select an adjustment.
Philips: Picture jitter if contrast function is used.
Philips 23PF9966/37 LCD TV
Picture jitter if contrast function is used.
> Replace transistor 7563 on Scaler board.
Philips: No sound
Philips 23MW9010/37 LCD TV
No sound
> Defective sound output IC7731 (AN7522).
Philips: Stuck in standby
Philips 42PF7621/D10 LCD TV
Stuck in standby. Switches to protection mode. Green LED flashes.
> Replace capacitors 2540 and 2544 (both 10nF). Change to both with 220nF.
Philips: High pitched noise coming from LCD supply
Philips 42PF7621/D10 LCD TV
High pitched noise coming from LCD supply
> Check or replace 5025, 5026 and 5027 at LCD supply and glue them if necessary.
Philips: Switches off for a second or two intermittently.
Philips Chassis BJ3.0E_LA LCD TV
Switches off for a second or two intermittently.
Relay clicks and standby LED remains green. Switches off intermittently with green LED on, no sound or picture.
> Check 27MHz KDS quartz crystal (SSB, item 1H00). Replace all yellow marked crystals (made in China) bearing a "5E", "5J" or "5K" batch number. Also replace all silver marked crystals (made in Taiwan) bearing a "6D" batch number. Note: Replace crystals with order code 242254301397.
Polaroid: No Start-up
Polaroid FLM3232 LCD TV
Symptom: No startup.
> Replace Z9 zener diode with NTEPN4990 in the PSU.
SONY: Stuck in standby. Standby LED is green.
Sony KDL32U2000 Chassis SE1 LCD TV
Symptom: Stuck in standby. Standby LED is green.
Red LED flashes 3 times. No remote control or front panel functions.
> Check or replace D301 zener diode (can be use a 5v zener diode) for short circuit.
SONY: Error code 4
SONY KDL40U2000 LCD TV
Error codes 4
LED turns green, flashes 4 times then goes green again and flashes 4 times again. Fuse (500mA) on inverter panel open circuit.
> Replace the fuse on inverter board.
SONY: No start-up. Red LED flashes 3 times.
SONY KDL40U2000 LCD TV
No start-up. Red LED flashes 3 times.
Slow start-up before this symptom occurred. The standby 5v ok. PSU heat sensitive.
> Check C6055 (47uf/25v) in G2 supply.
Toshiba: Dead
Toshiba 32WLT58 LCD TV
Dead
> Check F870 (2A), Q860 (STRZ4479) and D866. If F801 open circuit, then check the voltage regulator Q820 for short circuit, R831 (4.7R/5W) and D825 (MTZJ33A).
Viewsonic: Picture flickers and is brighter on the right, than on the left
Viewsonic N3260W VS114361M LCD TV
Picture flickers and is brighter on the right, than on the left.
> Replace four electrolytic capacitors (2x 820uF and 2x 1000uF) in upper left PSU.
Viewsonic: No startup
Viewsonic N3260W VS114361M LCD TV
No startup
> Check capacitors (with ESR Capacitor tester), Q7 and SMD resistor R65 (5.1R) in primary side of PSU. This TV set using the FSP228-3F01 PSU.
Westinghouse: Blue screen. No sound, no picture and no OSD
Westinghouse LTV40W1HDC LCD TV
Blue screen. No sound, no picture and no OSD.
> Replace circuit protector fuse on T-CON board.
Dell W2600: Erratic functions
Dell W2600 LCD TV
Erratic functions.
Sometime the TV locks-up problem shuts down, no start-up and no remote control or front panel functions too.
> Resolder or reflow system ROM IC1234 and all regulator ICs on the main board.
DELL W2600: Display locks after 10 minutes
Dell W2600 LCD TV
Locks after 10 minutes
> Change regulator IC (LM1117 DT-2.5) on main board.
DELL W2600: No start-up after warm-up
Dell W2600 LCD TV
No start-up after warm-up
> Replace capacitor (10uf/50v) on small board mounted to power supply next to main board power connector.
Acer AT3201W LCD TV
No function on user control and remote control
No function on user control and remote control
When SCART module removed, remote control reaction ok.
> Replace electrolytic capacitors C348 and C350 (both 220uF/16v) on main board.
Bush IDLCD26TV05HD Chassis L9 LCD TV
BUSH: No Backlight
No Backlight
There is no 24v to the inverter board after a while. Sensitive to power supply tapping.
> Check & replace SMD 27v zener diode (red with yellow bands). Note: There are no reference numbers on any of the SMD components. The diode is located in primary side of the 24v chopper transformer supply, near pin5-8 of the SMD IC (UC3843A). (This PSU board is GDP002 ZR1910R NETZTEIL SPS 180W 24/5 12/5 PFC 2PIN(LISH)).
Hitachi 28LD5200E LCD TV
Intermittent Color or no color
Intermittent Color or no color. Color drops out after the unit has been running for two to three hours.
> Resolder capacitor C510 and other components in its vicinity.
Hitachi 26LD6600 & 26LD6600A_B_C_D, 32LD8A10, 37LD6600, 37LD6600A & 37LD8500, 37LD8550, 37LD8600, 37LD8700C, 37LD8700CA, 37LD8700U, 37LD8700UA, 37LD8A20, 37LD8D10, 37LD8D20E, 37LD8D20U LCD TV
Poor image quality or polarization of image
Poor image quality or polarization of image
This phenomenon may be very intermittent and only displayed after a number of hours/days on soak
Cause: The glue on the LDVS cable heats up over time and the properties change and creating a contact problem within the cable and the PCB. This causes permanent or intermittent picture problems
> Remove the LDVS cable and clean the connections at the LCD control panel and replace the LVDS cable.
Hitachi 26LD6600 & 26LD6600A_B_C_D LCD TV
Hitachi: SOCKET CHANGE ON POWER BOARD 17PW15-9
Tip: SOCKET CHANGE ON POWER BOARD 17PW15-9
Change: On the new version of Power Board 17PW15-9, socket PL805 has been changed to a 13 pin. On the earlier version of the power board socket PL805 is 12 pin.
When new Power Board with 13 pin ( PL805 socket ) is fitted to a set, the connector lead from socket PL805 must be changed .
Hitachi 26LD6600 & 26LD6600A_B_C_D, 32LD8A10 LCD TV
CHANGE OF POWER SUPPLY FROM TYPE 17PW15-8 & 17PW15-9 TO 17PW20
Model/s: Tip: CHANGE OF POWER SUPPLY FROM TYPE 17PW15-8 & 17PW15-9 TO 17PW20
The original power supply, version 17PW15-8 & 17PW15-9 has now been changed to the later version 17PW20
When fitting the new power supply, it may also be necessary to replace two cables with a new type as described below.
There is one new part number to replace all. This new part number will supply a kit that includes the power supply and the necessary new cable which you should use if required.
Remove the following connecting leads used with Power board 17PW15-8
1.Remove cable from Power board connector PL806 going to Mainboards MB15E-5 or MB15E-7 connector PL902.
2. Remove cable from Power board connector PL805 going to Mainboards MB15E-5 or MB15E-7 connector PL900 .
Replace the two cables with the new cable type:
Order New cable part number VS30049856
CHANGES:
Insert new cable:
1. On the Power Board Connect 12 pin connector of the new cable to PL805
2. On the Main Board: Connect the 7 pin connector of the new cable to PL902 and 12 pin connector to PL900.
Hitachi 26LD6600 & 26LD6600A_B_C_D, 32LD8A10, 37LD6600, 37LD6600A, 37LD8600, 37LD8700C, 37LD8700U LCD TVs
Hitachi: FITTING NEW MAIN BOARD TYPE MB15E-7
Tip: FITTING NEW MAIN BOARD TYPE MB15E-7
When new Main board type MB15E-7 is replaced instead of Main board type MB15E-5 the following changes have to be made.
REMOVE PARTS:
1. Remove and discard cable between Audio board (AMP05) connector PL709 and Main board connector PL1001.
2. Remove and discard cable between Audio board (AMP05) connector PL704 to main board connector PL903
CHANGES:
Order New cable part number VS30051586
Insert new cable:
On the main PCB Connect 6 pin connector of the new cable to PL1004.
On the Audio PCB you must first Check the version of Audio PCB fitted to the TV.
For Audio PCB version AMP05: Connect the 5 pin connector of the new cable to PL709 and 2 pin connector to PL704
For Audio PCB Version AMP03 : Connect the 5 pin connector of the new cable to PL709. As PL704 does not exist on this version the 2 pin connector must be removed and the cable then soldered to legs of D700 and D701.
New Chassis Version MB15E-7 changed in production as table below
Model Part Number Serial Number (From ~)
32LD8600A VS20286080 V61101471 ~ 32LD8A10A VS20286080 V61101681
Hitachi 26LD6600 & 26LD6600A, 32LD6600_A_B_C LCD TV
Symptom: No sound/audio
Cause: Sound setting may have been lost in the memory and defaulted to zero.
> Reinstate sound settings as follows:
Enter Service mode.
Press Menu then 4,7,2,5.
Go to Audio menu.
Select Sound 2. and enter the following values:
FM PRESCALER 15
NICAM PRESCALE AVL ON 35
SCART PRESCALE AVL ON 14
SCART VOLUME AVL ON 122
GO TO STANDBY TO MEMORISE SETTINGS
Hitachi: Burn in Mode when replacing Main PCB: Hitachi 26LD6600 & 26LD6600A, 32LD6600_A_B_C, 37LD6600 LCD TV
Tip: Burn in Mode when replacing Main PCB
When replacing the main PCB on these models, the new part may be in the 'burn in' mode from manufacture. This will result in the image on screen flashing different colors.
To exit the burn in mode:
Use the remote control :
1. Press menu button
2. Press the following button sequence: 4,7,2,5 :
3. Go to “OPTIONS” and then set “BURN IN MODE” to either ON or OFF.
Hitachi 26LD6200 LCD TV
Audio noise may be heard from speakers when unit is in Tuner mode
Audio noise may be heard from speakers when unit is in Tuner mode and the volume control is set to near minimum.
> Add four SMD jumpers on the Amp board to positions J100, J101, J102 and J103 (JUMPER SMD 0603 R).
Hitachi: Retune of Digital TV channels
Hitachi 22LD4500UK LCD TV
Tip: Retune of Digital TV channels
1. Press the menu button on the remote control to display the main menu on screen
2. Use the cursor down button on the remote control to highlight 'Installation' and then press OK
3. “Your previous digital channel list will be destroyed. Are you sure……” This message will appear on screen, select yes using the left cursor button and press OK
4. All channels will automatically be installed.
Hitachi 22LD4500U, 22LD4500UK LCD TV
No sound or very low sound on terrestrial and no sound on Digital or any AV inputs.
Cure/Solutions: This is a software/firmware problem. Replace memory IC302 Type 24LC16 (part number: VS20167612). All customer controls are set to minimum on the new IC. Please reset language and all picture controls to normal after replacing the IC.
Hitachi 22LD4200 LCD TV
Green horizontal line flashing across the screen intermittently
> Remove resistor R149 on the Input signal board (Signal processing-analog) and replace it with Jumper SMD( 0 ohm, partnumber: VS30001734).
Hitachi L32VP03E, L32VP03U LCD TV
No Switch on from standby
No Switch on from standby
If the TV is switched into standby when it has been running for some time and is warm, it will not come out of standby until the set has cooled completely
> Replace the crystal X104 (XTAL 14.318MHZ 20PF 20PPM SMD ROHS, part number: VS30054926) on the main PCB/main logic board, the system control section.
Hitachi L32A01, L32A01A, L32H01E, L32H01EA, L32H01U, L32H01UA, 32LD8D20E_EA, 32LD8D20U, 32LD8D20UA LCD TVs.
Audio is distorted constantly and may have some background noise
> Replace D845 and D846 (both UF5402 3A/200V 150A, part number: VS30009366) on the power supply board/PSU.
Logik LCXW32HDI LCD TV
No sound or picture. The front controls light up & relay clicks.
> Check or replace R65 (2M) in U3 PSU for open circuit.
Panasonic: Enter Service Mode.
Panasonic TX-32LED7FM Chassis GLP22M LCD TV
Enter Service Mode.
1. Press F button to access volume setting.
2. Press V- button on set until volume reaches minimum.
3. While still holding V- button press 0 button three times on remote control.
4. Press 1 and 2 buttons to scroll through the menu.
5. Press 3 and 4 buttons to select an adjustment.
Philips: Picture jitter if contrast function is used.
Philips 23PF9966/37 LCD TV
Picture jitter if contrast function is used.
> Replace transistor 7563 on Scaler board.
Philips: No sound
Philips 23MW9010/37 LCD TV
No sound
> Defective sound output IC7731 (AN7522).
Philips: Stuck in standby
Philips 42PF7621/D10 LCD TV
Stuck in standby. Switches to protection mode. Green LED flashes.
> Replace capacitors 2540 and 2544 (both 10nF). Change to both with 220nF.
Philips: High pitched noise coming from LCD supply
Philips 42PF7621/D10 LCD TV
High pitched noise coming from LCD supply
> Check or replace 5025, 5026 and 5027 at LCD supply and glue them if necessary.
Philips: Switches off for a second or two intermittently.
Philips Chassis BJ3.0E_LA LCD TV
Switches off for a second or two intermittently.
Relay clicks and standby LED remains green. Switches off intermittently with green LED on, no sound or picture.
> Check 27MHz KDS quartz crystal (SSB, item 1H00). Replace all yellow marked crystals (made in China) bearing a "5E", "5J" or "5K" batch number. Also replace all silver marked crystals (made in Taiwan) bearing a "6D" batch number. Note: Replace crystals with order code 242254301397.
Polaroid: No Start-up
Polaroid FLM3232 LCD TV
Symptom: No startup.
> Replace Z9 zener diode with NTEPN4990 in the PSU.
SONY: Stuck in standby. Standby LED is green.
Sony KDL32U2000 Chassis SE1 LCD TV
Symptom: Stuck in standby. Standby LED is green.
Red LED flashes 3 times. No remote control or front panel functions.
> Check or replace D301 zener diode (can be use a 5v zener diode) for short circuit.
SONY: Error code 4
SONY KDL40U2000 LCD TV
Error codes 4
LED turns green, flashes 4 times then goes green again and flashes 4 times again. Fuse (500mA) on inverter panel open circuit.
> Replace the fuse on inverter board.
SONY: No start-up. Red LED flashes 3 times.
SONY KDL40U2000 LCD TV
No start-up. Red LED flashes 3 times.
Slow start-up before this symptom occurred. The standby 5v ok. PSU heat sensitive.
> Check C6055 (47uf/25v) in G2 supply.
Toshiba: Dead
Toshiba 32WLT58 LCD TV
Dead
> Check F870 (2A), Q860 (STRZ4479) and D866. If F801 open circuit, then check the voltage regulator Q820 for short circuit, R831 (4.7R/5W) and D825 (MTZJ33A).
Viewsonic: Picture flickers and is brighter on the right, than on the left
Viewsonic N3260W VS114361M LCD TV
Picture flickers and is brighter on the right, than on the left.
> Replace four electrolytic capacitors (2x 820uF and 2x 1000uF) in upper left PSU.
Viewsonic: No startup
Viewsonic N3260W VS114361M LCD TV
No startup
> Check capacitors (with ESR Capacitor tester), Q7 and SMD resistor R65 (5.1R) in primary side of PSU. This TV set using the FSP228-3F01 PSU.
Westinghouse: Blue screen. No sound, no picture and no OSD
Westinghouse LTV40W1HDC LCD TV
Blue screen. No sound, no picture and no OSD.
> Replace circuit protector fuse on T-CON board.
Dell W2600: Erratic functions
Dell W2600 LCD TV
Erratic functions.
Sometime the TV locks-up problem shuts down, no start-up and no remote control or front panel functions too.
> Resolder or reflow system ROM IC1234 and all regulator ICs on the main board.
DELL W2600: Display locks after 10 minutes
Dell W2600 LCD TV
Locks after 10 minutes
> Change regulator IC (LM1117 DT-2.5) on main board.
DELL W2600: No start-up after warm-up
Dell W2600 LCD TV
No start-up after warm-up
> Replace capacitor (10uf/50v) on small board mounted to power supply next to main board power connector.
Acer AT3201W LCD TV
No function on user control and remote control
No function on user control and remote control
When SCART module removed, remote control reaction ok.
> Replace electrolytic capacitors C348 and C350 (both 220uF/16v) on main board.
Bush IDLCD26TV05HD Chassis L9 LCD TV
BUSH: No Backlight
No Backlight
There is no 24v to the inverter board after a while. Sensitive to power supply tapping.
> Check & replace SMD 27v zener diode (red with yellow bands). Note: There are no reference numbers on any of the SMD components. The diode is located in primary side of the 24v chopper transformer supply, near pin5-8 of the SMD IC (UC3843A). (This PSU board is GDP002 ZR1910R NETZTEIL SPS 180W 24/5 12/5 PFC 2PIN(LISH)).
Hitachi 28LD5200E LCD TV
Intermittent Color or no color
Intermittent Color or no color. Color drops out after the unit has been running for two to three hours.
> Resolder capacitor C510 and other components in its vicinity.
Hitachi 26LD6600 & 26LD6600A_B_C_D, 32LD8A10, 37LD6600, 37LD6600A & 37LD8500, 37LD8550, 37LD8600, 37LD8700C, 37LD8700CA, 37LD8700U, 37LD8700UA, 37LD8A20, 37LD8D10, 37LD8D20E, 37LD8D20U LCD TV
Poor image quality or polarization of image
Poor image quality or polarization of image
This phenomenon may be very intermittent and only displayed after a number of hours/days on soak
Cause: The glue on the LDVS cable heats up over time and the properties change and creating a contact problem within the cable and the PCB. This causes permanent or intermittent picture problems
> Remove the LDVS cable and clean the connections at the LCD control panel and replace the LVDS cable.
Hitachi 26LD6600 & 26LD6600A_B_C_D LCD TV
Hitachi: SOCKET CHANGE ON POWER BOARD 17PW15-9
Tip: SOCKET CHANGE ON POWER BOARD 17PW15-9
Change: On the new version of Power Board 17PW15-9, socket PL805 has been changed to a 13 pin. On the earlier version of the power board socket PL805 is 12 pin.
When new Power Board with 13 pin ( PL805 socket ) is fitted to a set, the connector lead from socket PL805 must be changed .
Hitachi 26LD6600 & 26LD6600A_B_C_D, 32LD8A10 LCD TV
CHANGE OF POWER SUPPLY FROM TYPE 17PW15-8 & 17PW15-9 TO 17PW20
Model/s: Tip: CHANGE OF POWER SUPPLY FROM TYPE 17PW15-8 & 17PW15-9 TO 17PW20
The original power supply, version 17PW15-8 & 17PW15-9 has now been changed to the later version 17PW20
When fitting the new power supply, it may also be necessary to replace two cables with a new type as described below.
There is one new part number to replace all. This new part number will supply a kit that includes the power supply and the necessary new cable which you should use if required.
Remove the following connecting leads used with Power board 17PW15-8
1.Remove cable from Power board connector PL806 going to Mainboards MB15E-5 or MB15E-7 connector PL902.
2. Remove cable from Power board connector PL805 going to Mainboards MB15E-5 or MB15E-7 connector PL900 .
Replace the two cables with the new cable type:
Order New cable part number VS30049856
CHANGES:
Insert new cable:
1. On the Power Board Connect 12 pin connector of the new cable to PL805
2. On the Main Board: Connect the 7 pin connector of the new cable to PL902 and 12 pin connector to PL900.
Hitachi 26LD6600 & 26LD6600A_B_C_D, 32LD8A10, 37LD6600, 37LD6600A, 37LD8600, 37LD8700C, 37LD8700U LCD TVs
Hitachi: FITTING NEW MAIN BOARD TYPE MB15E-7
Tip: FITTING NEW MAIN BOARD TYPE MB15E-7
When new Main board type MB15E-7 is replaced instead of Main board type MB15E-5 the following changes have to be made.
REMOVE PARTS:
1. Remove and discard cable between Audio board (AMP05) connector PL709 and Main board connector PL1001.
2. Remove and discard cable between Audio board (AMP05) connector PL704 to main board connector PL903
CHANGES:
Order New cable part number VS30051586
Insert new cable:
On the main PCB Connect 6 pin connector of the new cable to PL1004.
On the Audio PCB you must first Check the version of Audio PCB fitted to the TV.
For Audio PCB version AMP05: Connect the 5 pin connector of the new cable to PL709 and 2 pin connector to PL704
For Audio PCB Version AMP03 : Connect the 5 pin connector of the new cable to PL709. As PL704 does not exist on this version the 2 pin connector must be removed and the cable then soldered to legs of D700 and D701.
New Chassis Version MB15E-7 changed in production as table below
Model Part Number Serial Number (From ~)
32LD8600A VS20286080 V61101471 ~ 32LD8A10A VS20286080 V61101681
Hitachi 26LD6600 & 26LD6600A, 32LD6600_A_B_C LCD TV
Symptom: No sound/audio
Cause: Sound setting may have been lost in the memory and defaulted to zero.
> Reinstate sound settings as follows:
Enter Service mode.
Press Menu then 4,7,2,5.
Go to Audio menu.
Select Sound 2. and enter the following values:
FM PRESCALER 15
NICAM PRESCALE AVL ON 35
SCART PRESCALE AVL ON 14
SCART VOLUME AVL ON 122
GO TO STANDBY TO MEMORISE SETTINGS
Hitachi: Burn in Mode when replacing Main PCB: Hitachi 26LD6600 & 26LD6600A, 32LD6600_A_B_C, 37LD6600 LCD TV
Tip: Burn in Mode when replacing Main PCB
When replacing the main PCB on these models, the new part may be in the 'burn in' mode from manufacture. This will result in the image on screen flashing different colors.
To exit the burn in mode:
Use the remote control :
1. Press menu button
2. Press the following button sequence: 4,7,2,5 :
3. Go to “OPTIONS” and then set “BURN IN MODE” to either ON or OFF.
Hitachi 26LD6200 LCD TV
Audio noise may be heard from speakers when unit is in Tuner mode
Audio noise may be heard from speakers when unit is in Tuner mode and the volume control is set to near minimum.
> Add four SMD jumpers on the Amp board to positions J100, J101, J102 and J103 (JUMPER SMD 0603 R).
Hitachi: Retune of Digital TV channels
Hitachi 22LD4500UK LCD TV
Tip: Retune of Digital TV channels
1. Press the menu button on the remote control to display the main menu on screen
2. Use the cursor down button on the remote control to highlight 'Installation' and then press OK
3. “Your previous digital channel list will be destroyed. Are you sure……” This message will appear on screen, select yes using the left cursor button and press OK
4. All channels will automatically be installed.
Hitachi 22LD4500U, 22LD4500UK LCD TV
No sound or very low sound on terrestrial and no sound on Digital or any AV inputs.
Cure/Solutions: This is a software/firmware problem. Replace memory IC302 Type 24LC16 (part number: VS20167612). All customer controls are set to minimum on the new IC. Please reset language and all picture controls to normal after replacing the IC.
Hitachi 22LD4200 LCD TV
Green horizontal line flashing across the screen intermittently
> Remove resistor R149 on the Input signal board (Signal processing-analog) and replace it with Jumper SMD( 0 ohm, partnumber: VS30001734).
Hitachi L32VP03E, L32VP03U LCD TV
No Switch on from standby
No Switch on from standby
If the TV is switched into standby when it has been running for some time and is warm, it will not come out of standby until the set has cooled completely
> Replace the crystal X104 (XTAL 14.318MHZ 20PF 20PPM SMD ROHS, part number: VS30054926) on the main PCB/main logic board, the system control section.
Hitachi L32A01, L32A01A, L32H01E, L32H01EA, L32H01U, L32H01UA, 32LD8D20E_EA, 32LD8D20U, 32LD8D20UA LCD TVs.
Audio is distorted constantly and may have some background noise
> Replace D845 and D846 (both UF5402 3A/200V 150A, part number: VS30009366) on the power supply board/PSU.
AMOI 32K1 LCD TV
No Display and No Sound
> When press on the standby mode button, LED light change from Red to Blue color but no backlight. Try to using a wire with a resistor connect the 3.3V to BL_ON signal, their backlight and screen logo AMOI are present but all front buttons and control no functions.
Replace the main board EEPROM IC 24C32, using a programmer to empty their Data and then solder it back to main board.
Philips 20PF5120/93 Chassis ML1.1A AA LCD TV
Randomly No Display but Sound Normal
> Find this R54 (54.9K ohm) resistor and replace it with a 75K ohm resistor on main board.
Philips 32PF7321/93 Chassis LC4.31A AA LCD TV
Sound Distorted
> Replace 2013 ceramic capacitor from 1.5nF to 10nF/50V ceramic capacitor.
Philips 42TA2000/93 Chassis TPT1.0A LA LCD TV
Display and Backlight flickering
> If capacitor on position 2083 positive pin is 24V and drops to ~20V, so measuring the capacitor on 2079, 2081 & 2082 with ESR tester or replace these 4 capacitor at the same time and problem solved.
Sharp LC26SA1E, LC26SD1E, LC32SA1E, LC32SD1E, LC42SA1E, LC42SD1E LCD TV
No Display, Sound Problem or Various operational key issues
> If after checking the whole PCB boards in TV still not solve the problem, it could be software issues.
Update the main software to the latest version, following the instructions in the service manual. Or using an ISP Programmer to empty their EEPROM IC first, if problem still the same, then you should program their flash memory by ISP Programmer with the working firmware.
Sharp LC46D78UN & LC52D78UN LCD TV
HDMI Connectivity Issues: No Sound or No Display When Turned On
In some cases, when connected via HDMI to an external audio amplifier or set top box an interruption to the sound and display may result when the TV us turned off and back on. This may occur due to current leakage from the HDMI-SW IC VHISII9287+-1Q on the mainboard.
> When the TV set requires service due to the above mentioned symptom, replace C1614 (0.1uF, 104 ceramic capacitor) on the mainboard with a 1K ohm1/16W resistor to reduce the leakage effect or just replace the main board.
Sharp LCD-37GA5 LCD TVNo Display and No Sound
> When press on the standby mode button, LED light change from Red to Blue color but no backlight. Try to using a wire with a resistor connect the 3.3V to BL_ON signal, their backlight and screen logo AMOI are present but all front buttons and control no functions.
Replace the main board EEPROM IC 24C32, using a programmer to empty their Data and then solder it back to main board.
Philips 20PF5120/93 Chassis ML1.1A AA LCD TV
Randomly No Display but Sound Normal
> Find this R54 (54.9K ohm) resistor and replace it with a 75K ohm resistor on main board.
Philips 32PF7321/93 Chassis LC4.31A AA LCD TV
Sound Distorted
> Replace 2013 ceramic capacitor from 1.5nF to 10nF/50V ceramic capacitor.
Philips 42TA2000/93 Chassis TPT1.0A LA LCD TV
Display and Backlight flickering
> If capacitor on position 2083 positive pin is 24V and drops to ~20V, so measuring the capacitor on 2079, 2081 & 2082 with ESR tester or replace these 4 capacitor at the same time and problem solved.
Sharp LC26SA1E, LC26SD1E, LC32SA1E, LC32SD1E, LC42SA1E, LC42SD1E LCD TV
No Display, Sound Problem or Various operational key issues
> If after checking the whole PCB boards in TV still not solve the problem, it could be software issues.
Update the main software to the latest version, following the instructions in the service manual. Or using an ISP Programmer to empty their EEPROM IC first, if problem still the same, then you should program their flash memory by ISP Programmer with the working firmware.
Sharp LC46D78UN & LC52D78UN LCD TV
HDMI Connectivity Issues: No Sound or No Display When Turned On
In some cases, when connected via HDMI to an external audio amplifier or set top box an interruption to the sound and display may result when the TV us turned off and back on. This may occur due to current leakage from the HDMI-SW IC VHISII9287+-1Q on the mainboard.
> When the TV set requires service due to the above mentioned symptom, replace C1614 (0.1uF, 104 ceramic capacitor) on the mainboard with a 1K ohm1/16W resistor to reduce the leakage effect or just replace the main board.
Stuck in Standby mode.
The LED light lit with Red color and its show on standby mode. Even press the power on button or using remote control also cannot power up the TV.
> After testing the PSU board, their standby 5V present and BL_ON signal (3.16V) was sent from main board to inverter board. And then their main chipset, Vcc voltage, clock or crystal waveform and reset circuit all normal, so that’s mean their main chipset is working properly. But their POWER_ON signal is missing and not present on the switch transistor to drive the RL701 to start-up the PSU.
From the previous experience, if all section in good condition but still no start-up, then it could be their MCU chipset or external flash memory (or their firmware corrupted) defective. Because of the Sharp LCDTV have lots of this problem was causing by their flash memory firmware corrupted. So checking the flash memory firmware first and found it was in IC3001 (L64) position. After solder it out, using an ISP programmer to backup their original firmware first. In case it is not the flash memory problem, then you can program it back to original version firmware. After that, find a correct version & working firmware and using the ISP programmer to program it into the L64 flash memory IC. Solder back this L64 flash memory into the mainboard. Power on this Sharp LCD-37GA5 LCD TV and it is working perfectly now! Problem solved and confirmed it was the firmware corrupted till it can’t start-up the power supply.
24E60HR LED TV
No Backlight or Display Dim
> This symptom is a common fault for this LED TV. Their problem was causing by LED Inverter/Drive board. When testing the LED Drive board C1 voltage, it is just 24V only. That’s mean their LED Drive board not working. Try to re-solder the LED Drive board U01, U02 and their surrounding components. After solder the board, their LED backlight is working now.
Skyworth 55LED10 Chassis 8K81 LED TV
Hard to start-up the TV when first time power it on.
When this LED TV every day first time power on, it is hard to start-up the TV. Check their 24V is ok but 12V output just have about 6~7 V only.
> This TV is using the ChiMei lcd panel and their PSU board is use 168P55PTQC-00. The PSU 12V output is from 24V through a DC-DC circuit generated. Change the R212 from 10 ohm to 0 ohm and R214 from 10 ohm to 4.7 ohm.
SONY KLV-26S550A, KLV-32S550A, KLV-37S550A LCD TV
Flashing and Jittering Display
When watching certain channels in RF mode, the picture may be flashing and jittering intermittently.
Cause: Abnormal signal condition- the problem channel has a wider H-sync width compared to the SECAM standard signal (difference up to 1,2us)
> Update the firmware to the latest version. In case of a 32 inch panel, first check the panel type before updating.
Sony KLV-32G480A LCD TV
No Display but sound ok and backlight working.
The screen has a “TV” character on the screen but no display, just black screen.
> Since this LCD TV sound and backlight ok, so the problem should be on the mainboard. Using volt meter testing the T-CON board Vcc line and it has 12V there. So the problem could be the mainboard Scaler IC, MCU, Flash memory, EERPOM or T-CON board. After testing the Scaler IC & MCU corresponding circuits like reset, Vcc and crystal all looking well. So try to check the flash memory & eeprom IC. Found these ICs were beneath of the mainboard. The IC3001 is 25L08 flash memory IC and IC3002 is 24C64 eeprom IC. So start the easy one, remove IC3002 (24C64) and using programmer to save their original data first and then erase this eeprom IC till it empty and all show “FF” on the programmer software. Solder 24C64 eeprom IC back to mainboard and power on the LCD TV. The TV screen can show a perfect display now and problem solved.