Lenovo 2765PAU - ThinkPad T400 14.1" Notebook, Service Manual, Page: 32 / 94

Keyboard problems
Problem:
All or some keys on the keyboard do not work.
Solution:
For Windows Vista
®
:
1. Click Start
→
Control Panel .
2.
Click Hardware and Sound , and then click Keyboard .
3. Select the Hardware tab. In the Device Properties, make sure that the
Device Status is This device is working properly .
For Windows XP:
1.
Click
Start → Control Panel
.
2. Click Printers and Other Hardware , and then click Keyboard .
3. Select the Hardware tab. In the Device Properties, make sure that the
Device Status is This device is working properly .
If keys on the keyboard still do not work, have the computer serviced.
Problem:
A number appears when you type a letter.
Solution:
The numeric lock function is on. To disable it, press and hold Shift or Fn and
then press NmLk (ScrLk).
Problem:
All or some keys on the external keyboard or numeric keypad do not work.
Solution:
Make sure that the external keyboard or numeric keypad is correctly
connected to the computer.
Pointing device problems
Problem:
The scrolling or magnifying glass function does not work.
Solution:
Check the mouse driver in the Device Manager window, and make sure that
the ThinkPad UltraNav
®
Pointing Device driver is installed.
24
ThinkPad
®
T400 and R400 Service and Troubleshooting Guide