LG 24LF454B Service Manual page 10

2. No Screen on
Module Back Light On?
Y
Check Panel Power 12V (P401 #30)
Check IC500 Output 12V
Y
Check Panel input Clock
P401 (#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 IC500 &
Recheck
Check IC300
N
Repair Main B/D
N
Replace Cable
- 10 -
N
Check IC300
Replace Main SOC
N
Check IC1001 & Q1002
Replace LED Driver IC or FET
LGE Internal Use Only