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Troubleshooting
This chapter provides troubleshooting information for the AL2251W:
1. 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 U201 PIN2=2.5V
U202 PIN2=3.3V
OK
X601 and X401 oscillate
waveforms are normal
OK
Replace U601
NG
Replace U401
NG
NG
NG
Replace X601, X401
33
Chapter 4
Reinsert or check the
Adapter/Inverter
Check CN201 or replace
U201, U202
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