QUICK SERVICE TIPS GUIDE LCD AND PLASMA TV REPAIR

LCD and plasma TV repair
LCD TV Board Samsung UE40D5000PW
When turned on, the LED starts flashing. There is no generation on the FA5591. Check QS801 for replacement (leak).

Philips 40PFL3107H / 60 S TPM9.2E LA
There is sound and image, but no backlight. Check the LM358 chip on the inverter board. When one of the LEDs burns out, you can replace it with a jumper by disconnecting one of the shunt resistors in the driver. You can reduce the backlight current from 400 to 300 mA by soldering R059 10 Ohms.

LCD LG 32LB561U
No image. Check matrix cables.

Liberton LCD 3213ABUV
Stripes, image freezes. Defective matrix.

Samsung PS51D490A1W
Artifacts in the image (spots, blurred). Defective matrix.

LCD Toshiba 40LV833RB
It does not turn on, the red LED lights up, does not respond to buttons. Check U4 - U5 AX3513, IC301 FSFR1800.

Toshiba 20JL7R
There is no backlight, half of U2 4606 is broken, two fuses have blown. The assembly can be replaced with IRF7319. Possible leakage in other assemblies.

LG 32PC52
Sound without image. Check C202, C207, R531 6.2K.

PHILIPS 47PFL7403
No sound in the speakers. There is sound in the headphones and on the audio output. Replace the AD8197 HDMI Switch.

AKAI LTA-32N576hcp
The 22 ohm resistor R102 burns out in the power supply. By replacing the diode D5 and capacitor C39.

SAMSUNG PS43E450A1W
Negative image with spots. Check R4087 and R4063 (6.3 Ohm) in the TLP155 power supply.

Panasonic TX-LR32C10
When turned on, after flashing the green LED, red flashes. Breakdown on the body in the backlight at the junction of the plastic plates.

Philips 32PFL5406H / 60
Negative image, gamma correction does not work. Check tracks if water gets into the unit.

SHIVAKI STV-22LEDG7
No sound. Check for leaks of C232. If U2 burns out, then this is SY8132

Samsung UE37D6100SW
It does not turn on after a power surge. Breakdown on the IC601 power line - HDMI port of the Silicon Image SiI9489CTUC processor. You can remove the processor, it will work without HDMI.

LG 32LW5700 JA
A screen saver appears, the LED flashes 4 times, the brightness of the backlight decreases. The processor falls off - warm up.

LG 42PN450D
It does not turn on. Check for a breakdown of Q703, Q704, Q707, Q708 and Q709. Check drivers for breakdown.

Toshiba 26WL66R
Color distortion in the image. Check for a breakdown of Q302.

Supra STV-LC24410FL
In standby mode does not respond to buttons. The processor is defective.

Rolsen RL-26D50D
The LED is on, the TV does not turn on. Check stabilizer Q081.

Sharp LC-37X20E
LEDs blink. Very rarely, but manages to turn it on. Check resistors R7835, R7836, R7837, R7832, R7833, R7834.

Thomson t32c30u
The network indicator lights up, but the TV does not turn on. Heat the hair dryer to 50-60 degrees SPI 25Q32. Check the soldering of the processor.

LG 42LA660V-ZA
There is a backlight, channel switching works, no image. Check for short-circuit ceramic capacitors on the matrix strips. If an image with stripes appears after detecting and replacing such a capacitor, check the resistor for clk2 output near TPS65198 - it should be 100 Ohms.

LG 39LN540V-ZA
After replacing the blown LEDs in the backlight, the brightness of the backlight is very small. Check by replacing Q803 KST2907.

Samsung LE32M87BDX
Pauses in the sound. If the problem disappears after tightening the control to turn on the external power supply to protect it with a 500 Ohm resistor, replace the VLF with an external one.

Samsung PS-42D5S
It does not turn on. Check 5N3011 for Y-MAIN, transistors in PSU and PWM L6598. If the colors are distorted after starting, check the resistor assemblies on the logic board (4 x 47 Ohm). If there are colored stripes, then check the scan chip.

LG 42PA4510
It does not turn on. Standby voltage is normal. Check chip F4216MSF32.

LG 42PQ300R-ZA
Does not work. Check Q23 45E122, Q15 IRFP4332 (can be replaced with AP88N30), Q11-Q12 30G124.

Sharp LC-32GA8RU
Horizontal stripes on the screen. Check quartz 20.250 replacement.

Samsung UE46EH5300W
It does not turn on after a thunderstorm. Check PWM ICM801 FSFR1700, ICM851 TL431, QM801 MMBT2907, CM854 220 nF. If after replacing the FSFR1700 does not turn on, then check the chip for marriage, it often happens.

DIAGNOSING A BROKEN / CRACKED LCD / LED TELEVISION SCREEN

Accidentally hit the screen? Are there any cracks? If your TV screen is severely cracked and the damage has penetrated beyond that, then it is deep enough to have damaged the LCD, LED or Plasma. If this is your case, then it may cost more to repair your TV than to replace it.

Broken TV LCDscreen Broken LED TV matrix
The screens of modern LCD and LED TVs in most cases do not have an additional protective glass, except for the standard two components of the display, between which liquid crystals are placed to form the image. The thickness of the outer glass of the display of the middle diagonals is measured in tenths of a millimeter. For comparison, the thickness of a standard window glass is 3 mm.
The necessary margin of safety of the structure is achieved by the quality of the glass, and if the surface of the panel (matrix) is not subjected to impact or excessive pressure on the screen, mechanical damage usually does not occur on its own.

But, nevertheless, one often hears about the following complaints from the owners:
- I watched football, launched it in the heat with the remote control into the TV - a "web" formed at the site of the impact and stopped showing part of the screen at all. Can you repair it?
- The child was playing and hit the ball on the screen. Send stripes and distortion, it is impossible to watch. Can I fix it?
- The TV fell off the wall. Turned on - there is sound, there is no image, there are stripes and cracks on the screen. What to do?

The answer in all similar cases is unambiguous - it is impossible to restore the panel and it needs to be replaced.
Sometimes a random hit on the screen with a children's toy is enough and the TV can fall into the category of unrepairable ones for the reason that it is impossible to find a replacement on some panels, or its price along with transportation and installation may be more than the price of the TV.
The cost of replacing the panel can be clarified at the nearest Authorized Service Center (ASC) for a specific brand for your TV model. Typically, the addresses and phone numbers of such dealerships for all regions are indicated in the documentation that was issued upon purchase - warranty cards or user instructions.
Commercial workshops usually do not practice replacing LCD panels with new ones due to the unprofitability of such repairs, but may have a supply of components, including used panels.
Calling the nearest TV repair shops in the hope of finding a working SECOND-HAND matrix for a specific TV model will in any case not be superfluous before the TV is simply thrown away.
Often, many have a question. Why can’t you fix it? After all, the glass itself is intact and there are no visible external cracks, just stripes and interference ...

The fact is that the inner glass is often damaged, and with it the LCD crystals and the compounds between them. In any case, it is impossible to restore the internal structure of the matrix in this case by any even the most modern means of repair and it is necessary to replace the panel.
Repair of LCD panels was not originally provided for by manufacturers. Also, there are no instructions, diagrams and spare parts for their repair. The experience of the craftsmen and the presence of a warehouse of spare parts from used TV sets sometimes help to somehow rectify the situation. All initiatives to restore the functionality of LCD panels come directly from repairmen. In some cases, workshops may offer replacement glass from another panel that is structurally similar to yours, or other options to get out of this deadlock, for example, buy a non-repairable TV for spare parts at a reasonable price.
In conclusion, I would like to note that in some models of TVs an additional protective glass is used, which may crack from impacts, but the display glass and crystals will remain unharmed.
In such cases, broken glass can be replaced, or simply removed so that it does not interfere with viewing. But such televisions (with safety glasses) are extremely rare on sale. In addition, few buyers know about their existence and are puzzled in advance by the additional strength of the screen. Usually, when choosing a TV, they are guided by other criteria.

 Cracked TV Screen Repair Cost
Unless you are trying to fix a TV from the ’80s or earlier, cracked TV screen repair is not feasible; the entire display panel must be replaced instead. The cost of a replacement TV display panel is more than the cost of buying a new TV, and that’s before labor and other service costs.
Cracked or damaged TV screen repair is not covered by the manufacturer’s warranty.

TV Screen Replacement Cost

The cost of TV screen replacement is generally the same as or more than the cost of buying a new TV. Therefore, replacing a broken or malfunctioning TV screen is not considered a viable option. If the TV is under the manufacturer’s warranty, the manufacturer may replace the entire unit.
TV manufacturers do keep replacement TV screen panels on hand to support products under warranty in case the screen malfunctions, due to manufacturer defect.
If you still want to replace a damaged or malfunctioning TV screen, your best option is to find a used replacement panel or a broken TV of the same model on which the screen is still functional. You might find one on eBay, and you can hire a technician to change out the panel.

Why can’t you fix it? 

The simple answer is no, it is not practical, LCD panels are made as a package in a factory and once the glass is broken they are defunct.
Also replacing a screen is usually uneconomical because as the most expensive part of the display and because it needs calibration, the effort required to replace the panel is normally more than the cost of a new TV.

HOW TO FIX A LCD / LED TELEVISION THAT HAS WATER DAMAGE

Repairing a water-damaged LCD TV is difficult, and results vary based on the problem type, severity and location.When a television has water damage, there is, unfortunately, not a whole lot that you will be able to do yourself. You may find that a few different tricks will work and get your television working again, but you may end up having to take it to a professional repairman.Very often you have to hear questions from TV owners that are hard to give definitive answers.
For instance.
What to do if you washed the LCD TV screen and now it does not show?
They sprayed liquid from the sprayer onto the display, it leaked down and now streaks and stains appeared on the screen. Can I repair ...?
In such cases, it is rather difficult to reassure, but there are repair options.
1. Replacing the LCD panel (matrix). Repair is expensive, commensurate with the price of a new TV.
2. Panel recovery. Such repair does not guarantee a successful result and depends on the degree of damage to the panel components (contacts, loops and other components). It should be borne in mind that the repair of the matrix (panel) is not practiced in all workshops and service centers.
If in earlier models, where fluorescent lamps used the backlight in the panels, contact cables to the glass were glued on top and water penetration down the glass did not cause such negative consequences, in recent years the situation has changed dramatically.
In modern models of LED-TVs, panel designs with a lower arrangement of loops, driver strips and the T-Con (Timing Controller) board are practiced. This allows you to make the TV as thin as possible from above, and place all the blocks in the lower part of the body. In this case, the shift of the center of gravity gives additional stability to the TV when using it with a stand.
But, when any liquid flows down the screen, it spreads along the bottom of the frame and can fill the contact joints of the cables with the glass. In this case, it is impossible to reconnect the glass.
But more often, the liquid flows through the loops immediately to the lower bars and destruction can occur in the connections of the cables to the contact pads of the bars, which can be restored. Usually, masters duplicate them with copper conductors, soldering to the surviving sections of contacts and tracks.

Three significant factors complicate the situation:
1. Turning on the TV with flooded contact connections may cause the failure of the elements of the T-Con board.
2. Destruction progresses in time due to the onset of oxidative processes and literally corrodes the contacts and paths of loops, strips, as well as planar elements to which the liquid has got. Worse if you washed the screen not with water, but with a chemically active solution from the spray gun.
3. All damaged elements, including the T-Con board, are constituent components of the LCD panel assembly, are not separately supplied by manufacturers and are not commercially available. Also, there are no schematic diagrams in the documentation on the panel and sometimes it is impossible to determine the marking of damaged planar elements of the lower slats of the panel.
Tip for owners:
If after an unsuccessful attempt to wash the LCD TV screen the image disappeared or streaks appeared, you must immediately turn it off and get through to the workshop, where there are practical achievements in restoring the panels (matrices) to working. In half the cases, the result can be positive, if not delayed with such repairs. At the initial stage, the fracture is minimal if the fluid does not leak onto the inner surface and the glass contacts.
The faster the panel gets to the master, the greater the chance of a positive result.
If the recovery attempt fails, the panel must be replaced.
But in this case, there is another disappointing point. The price of a new panel can be 70-80% of the cost of the TV, so replacing it is usually unprofitable. Together with the cost of repair, the total amount in some cases may even exceed the price of a new TV.
Once again, we remind you that matrix repair was not initially provided for by their manufacturers. There are no instructions, diagrams, or components on sale for their repair. The experience of the masters and the availability of a spare parts warehouse from used TVs sometimes help to rectify the situation in one way or another. All initiatives and methods for restoring LCD panels come directly from the repairmen themselves based on personal experience.
In some cases, in some workshops, replacement of glass from another panel that is structurally similar to yours may be offered.
There are also other possible ways out of this situation, for example, you can sell a non-repairable TV for parts at a bargain price.
 TV users and owners!
In order to safely clean the screen from dust and dirt, use special wet wipes, which are widely available.
The use of "freshly squeezed" rags does not guarantee protection against penetration down under the frame of the formed drops, which may not be immediately visible. Sometimes one drop is enough. Be careful!