Keyboard, External Numeric Keypad, And Pointing Device Problems - IBM ThinkPad 760E Instruction Manual

Keyboard, External Numeric Keypad, and Pointing Device Problems

Problem
All or some keys on the
system keyboard do not
work.
The pointer drifts when
the computer is turned on
or after resuming normal
operation.
—or—
During computer
operation, the pointer
drifts when not using the
TrackPoint III.
The mouse or pointing
device does not work.
All or some keys on the
external numeric keypad
do not work.
If the problem occurs immediately after the computer returns to normal
operation from suspend mode, enter the power-on password. If a power-on
password is set, you must enter the password.
If the external keyboard is connected, the numeric keypad on the system
keyboard will not work.
If the external numeric keypad or the 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 resolved, check the connection of the external
numeric keypad, external keyboard, or the mouse. If there is still a problem,
have the computer serviced.
Drifting is a characteristic of the TrackPoint III and is not a defect. The drifting
occurs for several seconds under the following conditions:
When the computer is turned on.
When resuming normal operation.
When the TrackPoint III is pressed for a long period of time.
When the environmental temperature changes.
Verify that the mouse or pointing-device cable is securely connected to the
computer.
Try using the TrackPoint III. If the TrackPoint III works, suspect the
externally attached pointing device.
If you are using Windows 3.11, make sure Computer is set as MS-DOS
System with APM. See page 190.
If you are using a mouse that is not compatible with the IBM PS/ 2 mouse,
disable the TrackPoint III using the ThinkPad Features program.
1. For OS/ 2 and Windows, see page 153 to disable the TrackPoint III.
2. For DOS, use the PS2 command.
Verify that the external numeric keypad is correctly connected to the computer.
Troubleshooting
Action
Chapter 8. Solving Computer Problems
251