Acer AL1906 Service Manual - Page 33
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Troubleshooting
This chapter provides troubleshooting information for the AL1906:
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, U702
PIN2=3.3V
X401 oscillate waveforms are
normal
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No power
NG
NG
OK
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
Chapter 4
Check power section