Troubleshooting - Acer B223W Service Manual

Acer
1. No Power & LED Off

04 Troubleshooting

Unstable power
Check sampling
Circuit
Check the R pin
voltage of IC803
about 2.5V
Check pin2 of
IC802 voltage
is 3V
Check pin1 of
IC802 voltage
below 1V
Check R822,
R823, R824
Check the C pin
voltage of IC803
if 3V
Check R819, R820
Check R818, D804,
Change R808, R 809,
R810, R 811, R815,
R814 Q803
END
19
Acer –LCD-B223W
Change R822,R823,
R824
Change
IC803
C807 if short
Change
R818, D804,
C807