Acer V223HQ - Page 38

Acer Acer –LCD-B&V223HQ
37
3.Black screen
U105 FAIL
Black screen
Check CCFL-
Enable(pin109)
of U105
Check crystal (pin
127,128) waveform of
U105
Check reset (pin108)
of U105
Check power supply
for U105
Check power
supply:pin 1,2 of
CN102
Inverter Fail
Check
X101,C157,C158
Check C164,R175
Check U101&U102
PIN2
Power fail
NG
NG
NG
NG
NG
YES
YES
YES
YES
YES