Bedienungsanleitung Lenovo Thinkpad A285 (Seite 105 von 152) (Englisch)

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Power button problem

Problem: The system does not respond, and I cannot turn off the computer.

Solution: Turn off the computer by pressing and holding the power button for four seconds or more. If the

system still does not respond, remove the ac power adapter and reset the system by inserting one end of a

needle or a straightened paper clip into the emergency-reset hole. To locate the emergency-reset hole, see

“Bottom view” on page 5.

Boot problems

Print these instructions now and keep them with your computer for reference later.

• Problem: I receive an error message before the operating system loads.

Solution: Follow the appropriate corrective actions for power-on self-test (POST) error messages.

• Problem: I receive an error message while the operating system is loading the desktop configuration after

the POST is completed.

Solution: Find solutions by searching for the error message at the following Web sites:

–

https://support.lenovo.com

– https://support.microsoft.com/

Sleep and hibernation problems

• Problem: The computer enters sleep mode unexpectedly.

Solution: If the microprocessor overheats, the computer automatically enters sleep mode to allow the

computer to cool and to protect the microprocessor and other internal components. Check the settings

for sleep mode.

• Problem: The computer enters sleep mode immediately after the power-on self-test.

Solution: Ensure that:

– The battery is charged.

– The operating temperature is within the acceptable range. See “Operating environment” on page 12.

If the problem persists, have the computer serviced.

• Problem: A critical low-battery error occurs, and the computer immediately turns off.

Solution: The battery power is getting low. Plug the ac power adapter into an electrical outlet and then

into the computer. Alternatively, replace the battery with a charged one.

• Problem: The computer display remains blank after you press Fn to resume from sleep mode.

Solution: Check whether an external monitor was disconnected or turned off while the computer was in

sleep mode. If you disconnected or turned off the external monitor, connect it or turn it on before resuming

the computer from sleep mode. When resuming the computer from sleep mode without attaching the

external monitor or turning it on, and the computer display remains blank, press the display-mode

switching key

to bring up the computer display.

• Problem: The computer does not resume from sleep mode, or the system status indicator blinks slowly

and the computer does not work.

Solution: If the system does not resume from sleep mode, it might have entered sleep or hibernation

mode automatically because the battery is depleted. Check the system status indicator.

– If the system status indicator blinks slowly, your computer is in sleep mode. Connect the ac power

adapter to the computer; then press Fn.

Chapter 7. Troubleshooting computer problems 87

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Lenovo Thinkpad A285 Seite 105

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