Acer HARLEY TAB A3-A20 Service Manual page 63

8. Keypad Fault
Check if the keypad and DOME are
assembled correctly
Check if the keypad and DOME are
clean.
Check if the structural parts affect
DOME?
Check if the structural parts affect
DOME?
58
Keypad Fault
YES
NO
NO
NO
NO
Replace MB
OK
YES
Re-assemble the keypad
YES
Clean again
YES
Amend the related structural parts
YES
Replace the keypad and
make bad marks on keypad
YES
Repair the MB referring to the
troubleshooting guide for L3 repair