Acer AL1923 Service Manual page 36

2. Missing Color
Change
Cable
Change
R9,R11,R12,
U4
Change U4
or CN5 Cable
or Panel
Adjustment
R/G/B Color
Missing Color
NO
Check VGA or
NO
NO
NO
DVI Cable
Yes
Check
R9,R11,R12
Yes
Check CN5
LVDS Signal
Yes
Check OSD
R/G/B Gain
Yes
Change
Panel