Acer AL1917W

Acer Service Manual
23
4. Black screen
U105 FAIL
Black screen
Check pin4 of
CN101
Check CCFL-
Enable(pin 85)
of U105
Check crystal (pin 96,97)
waveform of U105
Check reset (pin84) of
U105
Check power supply
for U105
Check power
supply:pin 1,2 of
CN101
Check R167,Q106,
R108,R110
Inverter Fail
Check
X101,C153,C154
Check C144,R172
Check FB102,FB103,
FB105,FB106
Power fail
NG
NG
NG
NG
NG
NG
YES
YES
YES
YES
YESYES