Normal
audio
Y
N
Move to No
video/No audio
No video
Normal audio
On
Y
N
Normal
voltage
Y
N
Replace T-con Board
or module
And Adjust VCOM
Check Power Board LED B+ Voltage
(LED B+ voltage depends on Power BD Spec)
Normal
voltage
Y
N
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
1/11
Monitor Signage
Error
symptom
A. Video error
No video/ Normal audio
☞
A4
☞
A1
☞
A5 & A3
First of all, Check whether all of cables between board is inserted properly or not.
(Main B/D
↔ Power B/D, Power Cable, FFC LVDS Cable, Key Cable,,,)
1
Copyright
ⓒ
2018 LG Electronics Inc. All rights reserved.
Only training and service purposes.
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