IBM 560x User Guide
Troubleshooting
LCD Blank or Power-On Problems
Problem
Action
The screen is blank and
there are no beeps.
there are no beeps.
Note: If you are not sure
about the beeps, turn the
computer off; then turn it
on again, and listen for
the beeps.
about the beeps, turn the
computer off; then turn it
on again, and listen for
the beeps.
Verify that:
The battery pack is correctly installed.
The AC Adapter is connected to the computer and the power cord is
plugged into a working electrical outlet.
The computer power switch is turned on.
If the preceding items are correct and the screen remains blank, have the
computer serviced.
computer serviced.
The screen is blank and
there is one beep.
there is one beep.
Note: If you are using an
external monitor, go to
“External Monitor
Problems” on page 157.
external monitor, go to
“External Monitor
Problems” on page 157.
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 (see page 78).
prompt and then type the correct password and press Enter (see page 78).
If a power-on password is not set, verify that the brightness control on the
computer is correctly adjusted. If the preceding items are correct and the
screen remains blank, have the computer serviced.
computer is correctly adjusted. If the preceding items are correct and the
screen remains blank, have the computer serviced.
The screen is blank and
there is a continuous
beep, or two or more
beeps.
there is a continuous
beep, or two or more
beeps.
Have the computer serviced.
Only the cursor appears.
Reinstall your operating system and turn on the computer.
If there is still a problem, have the computer serviced.
xxxxx KB OK appears
and the computer halts.
and the computer halts.
Have the computer serviced.
The screen is unreadable
or distorted.
or distorted.
Verify that:
The ThinkPad display driver is installed correctly (refer to the Chapter 7 for
installation instructions).
The refresh rate settings in the ThinkPad Features program's display setup
screen (under the Advanced... button) are set to your display resolution and
color type.
color type.
Incorrect characters
appear on the screen.
appear on the screen.
Verify that operating systems and application programs have been installed and
configured correctly.
configured correctly.
If so, have the computer serviced.
The screen stays on
although the power switch
is turned off.
although the power switch
is turned off.
Press the Power Shutdown switch on the bottom of the computer with the tip of
a pen or, disconnect the AC Adapter and remove the battery pack to turn off the
computer. Then turn the computer on again.
a pen or, disconnect the AC Adapter and remove the battery pack to turn off the
computer. Then turn the computer on again.
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IBM ThinkPad 560 User's Guide