LG 32LH500B Service Manual page 20

Standard Repair Process
Error
LED TV
symptom
First of all, Check whether all of cables between board is inserted properly or not.
(Main B/D↔ Power B/D, LVDS, Speaker Cable, IR B/D Cable)
Y
No video
Normal audio
A. Video error
No video/ Normal audio
Check Back Light
On
On with naked eye
N
A1
Check Backlight driver voltage and +24V input to LED light bar
Normal
Voltage
N
Repair power
board
Established
date
Revised date
A2
Check power board
Y
and main board
_PWR _12V
voltage: PANEL
Repair LVDS power
ciucuit or change
main chip
Y
Replace LED light
bar module
2016.03.07
Y
Replace T-con
Normal
Board or module
Voltage
N
End
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