Acer AT4250B Service Manual page 30

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Start
Connect with AC
power code and RF
cable or other
source signal
Press Power
On/Off
Button to LED
color show green
Picture right
Poor picture
No
NTF
END
24
POOR PICTURE QUALITY
Upload F/W
Check the LVDS
Yes
cable is well
Poor picture
No
Replace LVDS
cable
Swap the test
fixture
Main Board
Yes
Poor picture
No
Replace
Main Board
Replace
Yes
LCD panel
Capter3

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