LG 27UL850 Service Manual page 13

Module Back Light On?
Y
Check Panel Power
10V(JP209)
Y
Check e-DP Cable for
Damage or Open
Conductors
Y
Replace T-Con Board or Module
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Only for training and service purposes
2. NO SCREEN ON
N
Check WLED_ENABLE High?
(IC601 Pin #27)
N
Replace IC402 &
N
Replace Cable
N
Recheck
-13 -
Check IC 601
Replace Main Scaler IC
LGE Internal Use Only