Chapter 4 Troubleshooting - Acer AL1702 Service Manual

Troubleshooting
This chapter provides troubleshooting information for the AL1702W:
1. No Power
Please reinsert and make sure the
AC of 100-240 is normal
Measure U201 Pin 3=5V, U201 Pin
2=3.3V
Replace X401
No power
Press power key and look if the
picture is normal
NG
OK
NG
OK
Check if X401 oscillate
waveforms are normal
NG
OK
Replace U401
if the picture is normal
NG
Replace U501
NG
Reinsert or check the
power section
Measure CN201 Pin3=5V?
OK
Replace U201
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Chapter 4