Bedienungsanleitung Lenovo ThinkPad P72 (Seite 101 von 156) (Englisch)

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Computer screen problems

• Problem: My screen keeps blanking when I do not want it to.

Solution: Do the following:

1. Go to Control Panel, and ensure that you view Control Panel by Category.

2. Click Hardware and Sound ➙ Power Options.

3. Show the additional plans, and then select High performance.

• Problem: When I turn on the computer, nothing is displayed on the screen and the computer does not

beep while starting up.

Note: If you are not sure whether you heard any beeps, turn off the computer by pressing and holding the

power button for four seconds or more. Then turn on the computer and listen again.

Solution: Ensure that:

– The battery is installed correctly.

– The ac power adapter is connected to the computer and the power cord is plugged into a working

electrical outlet.

– The computer is turned on. (Press the power button again for confirmation.)

– The brightness level of the screen is appropriately set.

If a power-on password is set, press any key to display the prompt for the power-on password and then

type the correct password and press Enter.

If these items are correctly set, and the screen remains blank, have the computer serviced.

• Problem: When I turn on the computer, only a white cursor is displayed on a blank screen.

Solution: If you have modified a partition on your hard disk drive by using partition software, information

about that partition, or the master boot record might have been destroyed.

Do the following to try to solve the problem:

1. Turn off the computer, and then turn it on again.

2. If you still see only the cursor on the screen, do the following:

– If you have used partition software, examine the partition on the hard disk drive by using the

software, and recover the partition if required.

– Use the recovery solutions to restore the system to the factory default state. For more information,

see Chapter 9 “Recovery information” on page 93.

If the problem persists, have the computer serviced.

• Problem: The screen goes blank while the computer is on.

Solution: Your screen saver or power management might have been enabled. Do one of the following:

– Touch the TrackPoint pointing device or the trackpad, or press a key to exit the screen saver.

– Press the power button to resume the computer from sleep or hibernation mode.

• Problem: The screen is blank.

Solution: Do the following:

1. Press the display-mode switching key

to bring up the image.

2. If you are using the ac power adapter, or using the battery and the battery gauge shows that the

battery is not depleted, press the brightness-up key

to make the screen brighter.

3. If your computer is in sleep mode, press Fn to resume the computer from sleep mode.

4. If the problem persists, follow the solution for the following problem.

Chapter 8. Troubleshooting computer problems 83

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