Acer AL1917W Service Manual page 22

Acer
2. Unstable Power
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, C807
Change R808, R 809,
R810, R 811, R815,
R814,Q803
END
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Service Manual
Change R822,
R823, R824
if short
Change
R818, D804,
C807
Change
IC803