LG 24BK550Y Service Manual page 20

Module Back Light
On?
Y
Check Panel Power
5V(JP125)
Check IC700 Output
5V
Y
Check Panel Clock
P101(#10,11,22,23)
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
2. NO SCREEN ON
N
Check LED Driver
(P700 1,6)
N
Replace IC700 &
Recheck
N
Check IC100
Repair Main B/D
N
Replace Cable
N
FB
-20 -
Check IC100
Replace Main Scaler IC
LGE Internal Use Only