Read LG 55LEX8-SA (CHASSIS:LJ03S) Service Manual online
10. Trouble shooting - No video or Abnormal image (M+S block)
Check mini-LVDS FFC cable
Check VDD_LCM (16V)
VCC_LCM (3.3V)
VGH(24V)
VGL(-5V)
Check P-Gamma Data
Check IC9100
AVDD (R9112)
Check P-Gamma IC
I2C Line
Check VLCD_POWER(12V)
(IC900)
No good
Replace IC900
No good
OK
OK
Check HVDD
Replace IC701
No good
Replace IC600
No good
OK
Check output
data
OK
Replace P-Gamma IC
(IC9100)
No good
OK
Check Module
OK
8 V
16 V
-5 V
28 V
55 ALEF
8.2 V
16 V
-5 V
26 V
47 ALEF
HVDD
VDD_LCM
VGL
VGH
Module
Q Remark
OK
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