User's Manual

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 of the keys on the external numeric keypad do not

work.

Solution: Make sure that the external 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 PS/2 TrackPoint driver is installed.

Sleep (standby) or hibernation problems

Problem: The computer enters sleep (standby) mode (the sleep/standby

indicator turns on) immediately after Power-on self-test (POST).

Solution: Make sure that:

v The battery is charged.

v The operating temperature is within the acceptable range. See

“Specifications” on page 60.

If these items are correct, have the computer serviced.

Problem: The critical low-battery error message is displayed, and the

computer immediately turns off.

Solution: The battery power is getting low. Connect the ac adapter to the

computer and plug it into an electrical outlet, or replace the battery

with a fully charged one.

Solving computer problems

ThinkPad

T61 Service and Troubleshooting Guide