Lenovo V560 Notebook - Manual (Page 32)

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Chapter 5. Troubleshooting
Sleep or hibernation problems
The critical low-battery error
message appears, and the
computer immediately turns off. • The battery power is getting low. Connect the AC adapter to the
computer, or replace the battery with a fully charged one.
The computer enters sleep mode
immediately after Power-on self-test
(POST). • Make sure that:
- The battery is charged.
- The operating temperature is within the acceptable range. See
“Chapter 2. Use and care Information” of Lenovo Safety and
General Information Guide.
Note: If the battery is charged and the temperature is within range, have the computer serviced.
The computer does not return from
sleep mode and the computer does
not work. • If the computer does not return from sleep mode, it may have
entered hibernation mode automatically because the battery is
depleted. Check the power indicator.
• If your computer is in sleep mode, connect the AC adapter to the
computer, then press any key or the power button.
• If your computer is in hibernation mode or power-off state, connect
the AC adapter to the computer, then press the power button to
resume operation.
Note: If the system still does not return from sleep mode, your system has stopped responding, and you cannot turn
off the computer; reset the computer. Unsaved data may be lost. To reset the computer, press and hold the
power button for 4 seconds or more. If the computer is still not reset, remove the AC adapter and the battery.