L2 Troubleshooting Guide - Acer M330 Service Manual

V. L2 Troubleshooting Guide
1. Fail to power on
NO. Issue Description
1 Fail to power on
2. LCD issue
NO. Issue Description
LCD shows blank
1
screen/white screen/lines
LCD has defective
2
appearance
1. Check if LCD FPC is assembled in
place without breaking.
2. Use fixture to test LCD quality,
replace LCD if bad.
3. Check and repair MB.
Cause
Side key FPC isn't welded well
side key FPC breaks
MB has defects
Cause
LCD FPC isn't well assembled
FPC breaks
MB has defects
Link FPC isn't well assembled
Link FPC breaks
SW cause
FPC connector damages
LCD scratches
LCD is damaged
Solution
re-weld
replace side key FPC
Refer to MB Service Manual
1. Check if the FPC is damaged or
connects improperly
2. Replace the power key FPC
3. Check and repair MB
Solution
re-assemble LCD FPC
replace LCD
Refer to MB Service Manual
re-assemble FPC
replace Link FPC
re-update software
replace LCD
replace LCD
replace LCD
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