Read LG 42LH301C (CHASSIS:LD91A) Service Manual online
Normal
audio
Y
N
Move to No
video/No audio
video/No audio
No video
Normal audio
Normal audio
Check Back Light
On with naked eye
On with naked eye
On
Y
N
Check Power
Board
12v,5v etc.
Board
12v,5v etc.
Normal
voltage
Y
N
Replace Main Board
Replace T-con
Board or module
And Adjust VCOM
Board or module
And Adjust VCOM
OR
Repair Power
Board or parts
Board or parts
Check Power Board 20V /12V or 24v output
Normal
voltage
voltage
Y
Replace Inverter
or module
or module
N
Repair Power
Board or parts
Board or parts
End
Always check & record S/W Version and White
Balance value before replacing the Main Board
Balance value before replacing the Main Board
Replace Main Board
Re-enter White Balance value
Precaution
Established
date
Standard Repair Process
Revised date
2008. 3 .05
1/13
LCD TV
Error
symptom
A. Video error
No video/ Normal audio
First of all, Check whether all of cables between board is inserted properly or not.
(Main B/D
Power B/D, LVDS Cable,Speaker Cable,IR B/D Cable,,,)
1
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