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Sharp PC-AX40 Service Manual page 15

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17. Keyboard problem
Keyboard
Keyboard is OK?
Y
Lock key LED OK?
Y
Quick Key OK?
Y
Check J4,U16
N
Change Keyboard
N
Check
U12,R2,R3,R4,J501,J503
N
Check J1,Quick Key FPC
17/30
18. Touch pad problem
Touch pad
Touch pad clean?
Y
Change Touch pad
OK?
N
Check FFC between touch
pad and M/B
Check
L19,L20,L23,C171,
CP2,R161,R162
N
Clean up
Y
Check Touch pad
18/30

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