HP Compaq nc6220 Maintenance And Service Manual page 50

Troubleshooting
Flowchart 2.18—Nonfunctioning Keyboard
Keyboard
not operating
properly.
Connect notebook
to good external
keyboard.
External
device
works?
Y
Reseat internal
keyboard
connector
(if applicable).
Keyboard
operating
properly
Y
Done
2–24
N
Replace
system
board.
N
Replace internal
keyboard or
cable.
Keyboard
operating
properly
N
Replace
system
board.
Y
Done
Maintenance and Service Guide