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4.4.4. KEYBOARD, MOUSE or TOUCH PAD DIAGNOSIS
Make sure that connecting cables, connectors and AC adapter are not loose or disconnected prior to testing.
No.
Symptom
1
Key top cannot be
pressed.
Key top does not spring
back after pressing.
2
None of the keys function.
Certain keys do not
function.
3
Input character is
displayed as grabage.
4
Mouse does not function.
Inputs from the mouse are
not accepted properly.
5
Touch pad not function.
Input from the track ball
are not accepted properly.
6
Keyboard failure
7
Keyboard interface failure
Troubleshooting
procedures
No.
1-1
Keyboard is broken.
Replace the keyboard and
2-1
see if inputting from the
keyboard function normally?
3-1
Does the screen mode
correspond to the key entry
mode?
Is the keyboard setting in the
3-2
operating system correct?
Replace the keyboard and
3-3
see if inputting from the
keyboard functions normally.
Replace the mouse.
4-1
Does operation return to
normal?
Replace the touch pad.
5-1
Does operation return to
normal?
Replace the touch pad FPC.
5-2
Does operation return to
normal?
Is the keyboard properly
6-1
connected?
Replace the keyboard.
7-1
Does operation return to
normal?
4 - 8
Source of
problem
Result
Keyboard
YES
Keyboard
NO
Main PCB
YES Go to No. 3-2
Operating
NO
mistake
YES Go to No. 3-3
NO
Software setting
YES
Keyboard
NO
Main PCB
YES
Mouse
NO
Main PCB
YES Touch Pad
NO
Go to No. 5-2
YES
Touch Pad FPC
NO
Main PCB
YES
Go to No. 7
Keyboard was
NO
not connected
properly
YES
Keyboard
NO
Main PCB
Component
IC31
IC31
IC31
IC31
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