Power Button Problem; Boot Problems; Sleep And Hibernation Problems - Lenovo ThinkPad E485 User Manual
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Also See for ThinkPad E485:
- Hardware maintenance manual (102 pages) ,
- Setup manual (8 pages) ,
- Setup manual (6 pages)
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3. Inspect the ac power adapter. Check for any physical damage, and ensure that the power cable is
firmly attached to the adapter brick and the computer.
4. Verify that the ac power source is working by attaching another device to the outlet.
• Problem: My computer does not run on battery power.
Solution: If the battery runs out of power, attach the ac power adapter to recharge the battery.
• 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.
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.
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:
–
http://www.lenovo.com/support
–
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 10.
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.
• 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.
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E480, E485, and R480 User Guide
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Troubleshooting
