Chapter 4 Troubleshooting - Acer AL1716 Service Manual

Troubleshooting
This chapter provides troubleshooting information for the AL1716:
1. No power
Press power key and look if the
picture is normal
Please reinsert and make sure the
AC of 100-240 is normal
Measure U701 PIN2=3.3V,
X401 oscillate waveforms are
normal
No power
NG
NG
OK
U702 PIN2=3.3V
NG
OK
OK
Replace U401
Reinsert or check the
power section
Measure CN701 PIN5/6=12V?
Measure CN701 PIN9/10=5V?
NG
OK
Replace U701, U702
NG
Replace X401
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Chapter 4
Check power section