26LV2510-TB, 26LV251Y-TB, 26LV2530-TD (CHASSIS:LB01T) - LG TV Service Manual (repair manual). Page 38

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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 Main Board
3.5V,12V,3.3V,
1.26V, 1.5V etc.
Normal 
voltage
Y
N
Replace T-con 
Board or module
Repair Power 
Board or parts
Check Power Board 24V,12V,3.5V 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,,,)
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