Acer B223W - Bdmr - 22" LCD Monitor Service Manual - Page 32
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3. Panel Power Circuit
Check CN301 is solder
and Q301,Q302 is OK?
Check Correspondent
component.
White screen
Measure Q301 base
is low level?
OK
NG
OK
Replace PANEL
NG
X401 oscillate
waveform is normal
OK
Check reset circuit of
U401 is normal
OK
Replace U401
32
NG
Replace X401
NG
Check Correspondent
component.