Lenovo B50-80 (English) User Guide - Lenovo B40-xx, B50-xx - Page 37

Troubleshooting, Other problems, Your computer does not, respond.

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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 battery pack and the AC power adapter. • 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 EFI list of the BIOS setup utility. Make sure that 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. Make sure that the device is included in the EFI list in the BIOS setup utility correctly. • Press F12 when the Lenovo logo appears on the screen while the computer is starting up to select the device you want the computer starts from. The connected external device does not work. • Do not connect or disconnect any external device cables other than USB while the computer power is on; otherwise, you might damage your computer. • When using a high power consumption external device such as an external USB optical disk drive, use an external device power adapter. Otherwise, the device might not be recognized, or system shut down might result. 31

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Chapter 4. Troubleshooting
31
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 battery pack and the
AC power adapter.
• 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
EFI
list of the BIOS setup utility. Make sure
that 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. Make sure that the
device is included in the
EFI
list in the BIOS setup
utility correctly.
• Press
F12
when the Lenovo logo appears on the
screen while the computer is starting up to select the
device you want the computer starts from.
The connected external
device does not work.
• Do not connect or disconnect any external device
cables other than USB while the computer power is
on; otherwise, you might damage your computer.
• When using a high power consumption external
device such as an external USB optical disk drive,
use an external device power adapter. Otherwise,
the device might not be recognized, or system shut
down might result.