Acer AL2051W Technical Information PDF herunterladen (Seite 35)

35

No picture (LED orange)

No picture

The button if under

control

X401oscillate

waveform is normal

Replace U402

Replace X401

Measure U703 PIN2=1.8V

U705 PIN2=3.3V

Check Corresponden

t

component

Replace U401

X402 oscillate

waveform is normal

Replace U703, U705

OK

OK

OK

OK

OK

NG

NG

NG

NG

Check reset circuit of

U402 is normal

Check HS/VS from

CN407 is normal

Replace X402

Check Corresponden

t

component

NG

NG

OK

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