AOC LM725 Service Manual page 32

No picture (LED orange)
No picture
The button if
under control
OK
Measure U201 PIN2=2.5V
U202 PIN2=3.3V
OK
X401 oscillate
waveform is normal
OK
Check HS/VS from
Replace U401
CN301is normal
OK
Replace U401
NG
NG
Replace
U201, U202
NG
NG
X601 oscillate
waveform is normal
OK
Check reset circuit of
U601 is normal
OK
Replace U601
Replace X401
Check Correspondent
component
32
AOC LM725
NG
Replace X601
NG
Check Correspondent
component