Lenovo 646001U Troubleshooting Guide - Page 30

Pointing device problems, Sleep standby or hibernation problems - drivers

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Page 30 highlights

Solving computer problems Problem: Solution: Problem: Solution: A number appears when you type a letter. The numeric lock function is on. To disable it, press and hold Shift or Fn and then press NmLk (ScrLk). All or some of the keys on the external numeric keypad do not work. Make sure that the external numeric keypad is correctly connected to the computer. Pointing device problems Problem: Solution: The scrolling or magnifying glass function does not work. 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: Solution: Problem: Solution: The computer enters sleep (standby) mode (the sleep/standby indicator turns on) immediately after Power-on self-test (POST). 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. The critical low-battery error message is displayed, and the computer immediately turns off. 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. 20 ThinkPad® T61 Service and Troubleshooting Guide

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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
20
ThinkPad
®
T61 Service and Troubleshooting Guide