Lcd Blank Or Power-On Problems - IBM ThinkPad 760E Instruction Manual

Troubleshooting
Screen Message and Its
Meaning
DOS screen looks
smaller.
640 x 480
A screen or message that
is not listed.

LCD Blank or Power-On 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 to the
beeps.
The screen is blank and
there is one beep.
Note: If you are using an
external monitor, go to
"External Monitor
Problems" on page 247.
The screen is blank and
there is a continuous
beep, or two or more
beeps.
Only the cursor appears.
240
IBM ThinkPad 760E, 760ED, or 760EL User's Guide
When you use a DOS application that supports only VGA mode (640-by-480
resolution) with your computer, the screen image might look slightly distorted or
might appear smaller than the display size. This is to maintain compatibility with
DOS applications. To expand the screen image to the same size as the actual
screen, start the ThinkPad Features program and click on the Display button
); then select the screen expansion function. (However, the image may
(
look slightly distorted.)
Turn off the computer and start Easy-Setup; then select Test to test the
computer.
If the test ends with an error, make a note of the error code and have the
computer serviced.
If you cannot start Easy-Setup, have the computer serviced.
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 is on. (Turn on the power switch again for verification.)
If the preceding items are correct and the screen remains blank, have the
computer serviced.
If a power-on password is set, press any key to display a power-on password
prompt and then type the correct password and press Enter (see page 102).
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.
Have the computer serviced.
Reinstall your operating system and turn on the computer.
If there is still a problem, have the computer serviced.
Action
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