Acer AL1917

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