Troubleshooting charts

Other problems

Problem

 

 

Action

 

 

The

computer locks

or

Ÿ Your computer might lock when it enters suspend mode

during a communi-

does

not accept

any

cation operation. Disable the Suspend Timer when you

are working on the

input.

 

network.

 

 

ŸTo turn off the computer, push and hold the power switch for about five seconds, then release it.

The

computer

does

notIf

the suspend indicator is on and

you

are working

under

battery

power,

change

turn off with the powther

battery

to a

fully

charged

one

or

change

your

power

source

to AC

power.

switch.

 

 

If

you

still

have

a

problem, push

and hold

the

power

switch for

about

five s

 

 

 

 

 

 

 

 

then

release

it to turn off the

computer.

Restart

the

computer.

 

 

 

 

 

 

 

 

 

 

 

 

 

The

computer

does

notMake

sure that the startup sequence

in the BIOS Setup Utility is

set

so

that

start from a diskettecomputer. starts up from the diskette drive (see “Startup” on page 27).

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Performance

degrades The

processor

speed

might

decrease

under

the

following

conditions:

 

 

 

when

the

computer

gets

 

in a

hot

environment

 

 

 

 

 

 

 

 

 

 

 

hot

during

use.

Ÿ Use

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

ŸHigh-powered processing that requires high-power consumption

This is not a defect.

A memory shortage or Ÿ If you are using DOS:

memory error occurs.

1. Use the DOS command MEM /C to review your DOS memory usage occasionally.

2. Unload any unnecessary drivers from the CONFIG.SYS file. (For example, unload printer drivers if you do not use a printer.)

3.Reconfigure the UMB (upper memory block) using the DEVICEHIGH statement.

4.Use the multiple configuration setup for DOS (refer to the documents sup- plied with DOS).

108 ThinkPad 240 User's Reference

Page 120
Image 120
IBM 240 manual Other problems, Action