LG 32LW5700 Manual page 49

Standard Repair Process
LCD TV
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,,,)
No video Normal
Normal audio audio
Move to No
video/No audio
※Precaution ☞A7 & A3
Always check & record S/W Version and
White Balance value before replacing the
Main Board
Copyright ⓒ 2011 LG Electronics. Inc. All right reserved.
Only for training and service purposes
A. Video error
Error
symptom
No video/ Normal audio
☞A1
Y
Check Back Light
On with naked eye
N
☞A2
Check Power Board 24V /12V output
☞A4
Y
Check Power
On
Board
12v, 3.5v etc.
N
Normal Y
Replace Module
voltage
N
Repair Power
Board or parts
Replace Main Board
1
Established
2011.01.20
date
Revised date
Y
Normal
Replace T-con
voltage
Board or module
☞A28
N
Repair Power
Board or parts
End
Re-enter White Balance value
1/14
LGE Internal Use Only