Troubleshooting Charts; Lcd Problems - IBM ThinkPad 755CX Manual

What If Your Computer Does Not Work?

Troubleshooting Charts

In the charts, x can be any character.

LCD Problems

Problem
The screen is blank and
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 beep.
The screen is blank and
there is one beep.
Note: If you are using an
external display, go to
"External Display
Problems" on page 218.
The screen is blank and
there is a continuous
beep, or two or more
beeps.
Only the cursor appears.
xxxxx KB OK appears
and the computer halts.
The screen is unreadable
or distorted.
Incorrect characters
appear on the screen.
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IBM ThinkPad 755CX User's Guide
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 preceding items are correct and the screen remains blank, have the computer
serviced.
If a power-on password is set, type the correct password and press Enter (see
page 110).
If a power-on password is not set, verify that:
The brightness control on the computer is correctly adjusted.
The Display device parameter of the ThinkPad Features program is correctly
specified.
If the preceding items are correct and the screen remains blank, have the
computer serviced.
Have the computer serviced.
Have the computer serviced.
Have the computer serviced.
Verify that the ThinkPad display driver was installed correctly (see page
188).
Verify that Display in the Windows Setup screen is set to your display
resolution type (see page 177).
If these are correct, test the computer. If the test ends without an error, have
the computer serviced.
Verify that operating systems and application programs have been installed and
configured correctly.
If so, have the computer serviced.
Action