HP Compaq nc6220 Maintenance And Service Manual page 52

Troubleshooting
Flowchart 2.18—Nonfunctioning Keyboard
Keyboard
not operating prop-
erly.
Connect computer
to good external key-
board.
External
device
works?
Y
Reseat internal key-
board
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