Lenovo ThinkPad 560 Thinkpad 560 User's Guide - Page 170

LCD Blank or Power-On Problems, Problem, Action, Enter, KB OK, Power Shutdown

Page 170 highlights

Troubleshooting 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 for 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 157. 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. The screen stays on although the power switch is turned off. Action 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. 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). 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. Have the computer serviced. 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. Verify that operating systems and application programs have been installed and configured correctly. If so, have the computer serviced. 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. 152 IBM ThinkPad 560 User's Guide

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Troubleshooting
LCD Blank or Power-On Problems
Problem
Action
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 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.
The screen is blank and
there is one beep.
Note:
If you are using an
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).
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.
The screen is blank and
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.
Have the computer serviced.
The screen is unreadable
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.
Incorrect characters
appear on the screen.
Verify that operating systems and application programs have been installed and
configured correctly.
If so, have the computer serviced.
The screen stays on
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.
152
IBM ThinkPad 560 User's Guide