LG 27GL850 Service Manual page 11

2. No Screen on
Module Back Light On?
Y
Check Panel Power 10V (L700)
Check IC700 Output 10V
Y
Check Panel eDP AUX
P300 (#9, 10, 36, 37)
Y
Check FFC Cable for Damage or
Open Conductors
Y
Replace T-Con Board or Module
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Only for training and service purposes
N
Check WLED_ENABLE High?
(IC601,IC602 27pin)
Y
Check LED Driver Output
(P601, P602 - 1, 2, 5, 6)
N
Replace IC700 &
Recheck
Check IC300, IC303
N
Repair Main B/D
N
Replace FFCable
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N
Check P201 (PIN No.69)
Replace G-SYNC Module
N
Check IC601, IC602
Replace LED Driver IC
N
Replace G-SYNC Module
LGE Internal Use Only