Acer X221 Service Manual page 45

Service guide
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2. Missing Color
Change
Cable
Change
R1,R5,R10,
U2
Change U4
or CN2 Cable
or Panel
Adjustment
R/G/B Color
Missing Color
NO
R27,R29,R31
NO
NO
NO
Check VGA
Cable
Yes
Check
Yes
Check CN2
LVDS Signal
Yes
Check OSD
R/G/B Gain
Yes
Change
Panel

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