Other Problems - Lenovo IdeaPad Y450 User Manual

Chapter 4. Troubleshooting

Other problems

Your computer does not respond.
To turn off your computer, press and hold the power button for 4
seconds or more. If the computer still does not respond, remove the
AC adapter and the battery.
Your computer might lock when it enters sleep mode during a
communication operation. Disable the sleep timer when you are
working on the network.
The computer does not start from a device you want.
See the Boot menu of the BIOS Setup Utility. Make sure that the startup
sequence in the BIOS Setup Utility is set so that the computer starts from
the device you want. Also make sure that the device from which the
computer starts is enabled.
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