Black Screen - Acer H243 Service Manual

Acer

Black Screen

Check power supply:
Pin 1, 2 of CN104
Check power supply:
pin 8 of U104
Check Crystal
Pin 25,26 of U104
Check CCFL_Enable
Pin 101 of U104
OK
For U104
OK
Check reset:
OK
waveform
OK
OK
NG
U104 fail
Black screen
4.2
NG
NG
NG
NG
Check Pin 7 of CN104
42
Acer –LCD-H243H
POWER Fail
Check U101,
U102
Check C161,
R183
Check X101, C156,
C157,R191
NG
Inverter Fail
OK Check Q102,
R101, R102