LG 34UM94 Service Manual page 28

Trouble shooting : No Screen on
Module Back Light On?
Y
Check Panel Power 10V (L709)
Check IC705 Output 10V
Y
Check Panel Clock
P200(#16,17,32,33)
P201(#8,9,24,25)
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?
Y
Check LED Driver Output
(P2600, P2601 - 1,2,5,6)
N
Replace IC705 &
Recheck
Check IC100
N
Repair Main B/D
N
Replace Cable
N
Check IC100
Replace Main Scaler OC
N
Check IC2600, IC2601
Replace LED Driver IC
LGE Internal Use Only