User's Manual

Troubleshooting
Problem Cause and action
Some or all keys on the
keyboard do not work.
 If the problem occurred immediately after the computer returned from
hibernation mode, enter the power-on password if it set.
 If an external keyboard is connected, the numeric keypad on your computer
will not work. This is not a defect.
 If an external numeric keypad or a mouse is connected:
1. Turn off the computer.
2. Remove the external numeric keypad or the mouse.
3. Turn on the computer and try using the keyboard again.
If the keyboard problem is solved, check the connection of the external
numeric keypad, external keyboard, or mouse.
If you still have a problem, have the computer serviced.
A number appears when
you type a letter.
The numeric lock function is on. To disable it, press and hold Shift; then press
NumLk.
All or some keys on the
external numeric keypad
do not work.
Make sure that the external numeric keypad is correctly connected to the com-
puter.
All or some keys on the
external keyboard do
not work.
To use an external keyboard, you can attach it to the computer either directly or
through the keyboard/mouse cable. Make sure that:
 The keyboard cable is correctly connected to the computer (if the keyboard is
connected directly to the computer).
 The keyboard/mouse cable is correctly connected to the computer.
 The keyboard cable is connected to the correct side of the keyboard/mouse
cable.
If these items are correct, disconnect the keyboard/mouse cable from the com-
puter and make sure that the operation of the system keyboard is correct. If the
system keyboard works, have the keyboard/mouse cable or the external keyboard
serviced.
The internal numeric
keypad does not work.
If you connect an external numeric keypad or an external keyboard with a numeric
keypad, the internal numeric keypad is disabled. Use the external numeric keypad
instead.
All or some of the Fn
key functions do not
work.
If Notebook Manager is active, the Fn key functions related to Display Device
(Fn+F7, Fn+Home, Fn+End, Fn+Insert, and Fn+Delete) are disabled.
Note: Fn+Insert and Fn+Delete are available only for HPA models.
Chapter 4. Solving computer problems 29