HAIER L40R1 - TROUBLESHOOTING - DEFECTIVE SCREEN SHOTS

HAIER L40R1 - TROUBLESHOOTING - DEFECTIVE SCREEN SHOTS

TROUBLESHOOTING [GENERAL CHECK UPs]
LCD IS NOT BRIGHT        {Click on images to Enlarge}

NO PICTURE
First, check cables which connect with Power Supply Unit [PSU] then check as follows

• Check input voltage (CNA1)
• Check output voltage (CND1)

NO SOUND
First check cables, which connect with PSU then check as follows

• Check input voltage as NO picture
• Check speaker output.

POWER SUPPLY UNIT FAILURE

First, check cables, which connect with PSU, then check as follows

• Check PSU input voltage AC input (CON1)
• Check PSU output voltage orderly (CON2)

FAILURE SYMPTOMS

Block Defect :TCP cracking or cracking

Dim or L/D :TCP Sunken

TCP lead cracking

ACF bonding short

Awful environment and something electric enter into

LCD

Mis-align between TCP and Panel

Panel failure

TCP failure.

Dot Defect.

• Bright dot dark dot in panel.
• Panel or Polarlzer.

• Polarizer Bubble.

Bladder between Polarizer and top glass.

• Polarizer Scratch.

Tine or rigidity arose.

• F/M inside Polarizer.

Eyewinker inside Polarizer.

Abnormal Display.  Flashing.  Bright and dark display alternately.

• Chip lose action
• IC Abort or jointing bad
• Panel and VSC connect bad

• White Screen.  B/L normal, only white screen display.
• Black Screen.  B/L normal, only Black screen display.
• Maybe caused by surge current and EDS.

• FIicker or Crosstalk. è LCD Vcom imbalance.

Abnormal Color.  Capacitance improper bring crosstalk inside LCD panel. [OR] 

• Chip lose action.
• IC short or joint bad.
• Panel and VSC connect bad.

• Mechanlcal Noise.  è Caused by Mechanica noise of backlight unit.
• Ripple.  Connectric circle.  è Causeed by between mechanism and Panel.

• B/L off. B/L lose action.

Connect badness between wire and electrode.

• B/L dark.

Connect badness Short between wire and electrode.

• B/L wire damaged.  Operation abnormal or systemic noise.
• B/L wire open.  Operation abnormal or systemic noise.
• B/L shut down.  Short between lamp housing and wire, because consume power too much.

F/M.  F/M in B/L ,white, back Rotundity or wire like. è F/M in B/L unit.

Light leakage.  Brightness at bottom of LCM brighter than normal. è B/L unit badness.

Mechanical or B/L.  B/L brightness asymmetric. è Sheet in B/L unit is uneven.

Mount hole. è Lack screw Screw damage.

The above given screenshot can be taken as a reference to most of the flat panel televisions.

[B/L > Back Light.]

[F/M > Frequency Modulation]

[PSU > Power Supply Unit]