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Acer Acer –LCD-B223W
19
04 Troubleshooting
1. No Power & LED Off
Unstable power
Check sampling
Circuit
Check R822,
R823, R824
Change R822,R823,
R824
Check the R pin
voltage of IC803
about 2.5V
Check R819, R820
Check R818, D804,
C807 if short
Change
R818, D804,
C8
07
Check pin2 of
IC802 voltage
is 3V
Check pin1 of
IC802 voltage
below 1V
Change R808, R 809,
R810, R 811, R815,
R814 Q803
END
Check the C pin
voltage of IC803
if 3V
Change
IC803