ⓒ
LG Electronics. Inc.2009
Normal
audio
Y
N
Move to No
video/No audio
No video
Normal audio
Check Back Light
On with naked eye
On
Y
N
Check Power
Board
12v,3.5v etc.
Normal
voltage
Y
N
Replace T-con
Board or module
And Adjust VCOM
Repair Power
Board or parts
Check Power Board 24v output
Normal
voltage
Y
Replace Inverter
or module
N
Repair Power
Board or parts
End
Always check & record S/W Version and White
Balance value before replacing the Main Board
Replace Main Board
Re-enter White Balance value
※
Precaution
Established
date
Standard Repair Process
Revised date
1/13
LCD TV
Error
symptom
A. Video error
No video/ Normal audio
☞
A4
☞
A1
☞
A2
☞
A28
☞
A7 & A3
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
2010. 12 .14
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Only for training and service purposes
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Summary of Contents for 42LW5700
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