No Video/ Normal Audio - LG 55LB5610 Service Manual

Standard Repair Process
Error
LCD TV
symptom
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
☞A6 & A3
※Precaution
Always check & record S/W Version and White
Balance value before replacing the Main Board
Copyright © 2013 LG Electronics. Inc. All rights reserved.
Only for training and service purposes
A. Video error

No video/ Normal audio

☞A1
Y
Check Back Light
On with naked eye
N
☞A2
Check Power Board 24V output
Repair Power
Board or parts
☞A4
Y
Check Power
Board
On
3.5V, 12V, 24V etc.
N
Y
Normal Replace Inverter
Voltage or module
N
Replace Main Board
Established
2012. 01 .14
date
Revised date
Y
Replace T-con
Normal
Board or module
Voltage
N
Repair Power
Board or parts
End
Re-enter White Balance value
1/14
LGE Internal Use Only