Acer AL1917W Service Manual page 24

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