Acer AL1706

35
3.Interface Board Troubleshooting
3.1 Black Screen and backlight turn on
MCU Fail
Black screen
Check pin5 of
CN101
Check CCFL-
Enable(pin3)
of U105
Check crystal(pin20,21)
waveform of U105
Check reset (pin 10)
of U105
Check pin30,31,35,44
of U105(MCU)
Check power
supply:pin 1,2 of
CN101
Check
R105,R106,R157,
C114,Q103
Inverter Fail
Check
X101,C154,C155
Check
C150,D102,R137
Check
FB108,R131,R132,
R133
Power fail
NG
NG
NG
NG
NG
NG
YES
YES
YES
YES
YESYES