Acer V223HQ - Page 36

Acer Acer –LCD-B&V223HQ
35
04 Troubleshooting
1. No Power & LED Off
Unstable power
Check sampling
Circuit
Check R822, R823,
R824, R825
Change R822, R823,
R824, R825
Check the R pin
voltage of IC803
about 2.5V
Check R832
Check R818, D804,
C807 if short
Change R818,
D804,
C807
Check pin2 of
IC802 voltage is
3V
Check pin1 of
IC802 voltage
below 1.1 V
Change R808, R 809,
R810, R 811, R812,
R814,Q803
END
Check the C pin
voltage of IC803
if 3V
Change
IC803