IBM 240 User Manual
Troubleshooting charts
No error codes or messages
Problem
Action
The screen is blank and
you don't hear any
beeps.
you don't hear any
beeps.
Note: If you are not
sure whether
you hear any
beeps, turn the
computer off;
then turn it on
and listen again.
you hear any
beeps, turn the
computer off;
then turn it on
and listen again.
If you are using an
external monitor, go to
“External monitor
problems” on page 104.
external monitor, go to
“External monitor
problems” on page 104.
If a Power-on password is set, press any key to display the power-on password
prompt, and then type the correct password and press Enter.
prompt, and then type the correct password and press Enter.
If a power-on password is set but does not appear, the brightness control might
be set to minimum brightness. Adjust the brightness.If the screen still remains
blank, make sure that:
be set to minimum brightness. Adjust the brightness.If the screen still remains
blank, make sure that:
The battery pack is installed correctly.
The AC Adapter is connected to the computer and the power cord is plugged
into a working electrical outlet.
into a working electrical outlet.
The computer power is on. (Press the power switch again for confirmation.)
If the screen still remains blank, have the computer serviced.
The screen is blank and
you hear a continuous
beep, or two or more
beeps.
you hear a continuous
beep, or two or more
beeps.
Have the computer serviced.
Only the cursor appears.
Reinstall your operating system, and power on the computer.
If you still have a problem, have the computer serviced.
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ThinkPad 240 User's Reference