Chapter 4 Troubleshooting - Acer AL1917 Service Manual

Troubleshooting
This chapter provides troubleshooting information for the AL1917:
1. No picture (LED orange)
No picture
The button if under
control
OK
Measure Q702 D701 -1.8V
U702 PIN2=3.3V
OK
X401 oscillate
waveform is normal
OK
Check HS/VS from
CN405 is normal
OK
Replace U401
NG
Check reset circuit of
U406 is normal
Replace U402
NG
Replace Q702 or D701,
U705
NG
Replace X401
NG
Check Correspondent
component
33
OK
NG
Check Correspondent
component
Chapter 4