LG 22MT44D Service Manual page 16

2. No Screen on
Module Back Light On?
Y
Check Panel Power 12V (P600 #30)
Check IC800 Output 12V
Y
Check Panel input Clock
P601(#9, #10)
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
(C1024)
N
Replace IC400 &
Recheck
Check IC100
N
Repair Main B/D
N
Replace Cable
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N
Check IC101
Replace Main SOC
N
Check IC1001 & Q1002
Replace LED Driver IC or FET
LGE Internal Use Only