AOC 2230FH Service Manual page 39

22" LCD Color Monitor
No Picture
Check the signal cable
Measure U103 PIN2=3.3V
U104 PIN2=1.8V
Measure X401 oscillate
waveform is normal
Check HS/VS from CN402
is normal
No picture
OK
OK
OK
OK
Replace U401
NG
Change the signal cable
NG
Replace U103, U104
NG
Replace X401
NG
Check Correspondent
component
39
AOC 2230FH