Lenovo ThinkPad E580, Руководство пользователя, Страница: 86 / 142

Power problems
Print these instructions now and keep them with your computer for reference later.
• Problem : My computer is getting no power at all.
Solution : Check the following items:
1. Verify the power button. The power button is illuminated whenever the computer is on.
2. Check all power connections. Remove any power strips and surge protectors to connect the ac
power adapter directly to the ac power outlet.
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:
–
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 10.
If the problem persists, have the computer serviced.
• Problem : A critical low-battery error occurs, and the computer immediately turns off.
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E580 User Guide