Troubleshooting - Acer AL2051 Service Manual

Troubleshooting

This chapter provides troubleshooting information for the AL2051W:
1. Main board
No power
No power
Press power key and look
if the picture is normal
NG
Please reinsert and make sure
the AC of 100-240 is normal
OK
Measure U703 PIN2=1.8V
U705 PIN2=3.3V
OK
X401 and X402 oscillate
waveforms are normal
OK
Replace U402
NG
Replace U401
NG
Reinsert or check the
Adapter/Inverter
section
NG
Check CN201 or replace
U703, U705
NG
Replace X401, X402
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Chapter 4