LG L1718S-BN - - 17" LCD Monitor

19
Black Screen
Power Fail
Check power supply:
Pin1, 2 of CN101
Check pin34, 51, 66, and 82
Of U105
Check Crystal: Pin96,
Pin97
Of U105
Check CCFL
-
Enable
(pin85) of U105
MCU Fail
Check FB103
Check: X101,
C153, C154
Inverter Fail
O
K
NG
O
K
Check Reset (pin84)
Of U105
Check pin5 o
f
CN101
Check R167, Q106
R108, R110
Check C144, R172
NG
NG
O
K
O
K
Check pin32, 49, 56, and 75
Of U105
A
nd U102
Check FB106
A
nd U101
NG
NG
NG
O
K
O
K
O
K
NG
5.Black Screen and backlight turn on
-