Lenovo G580 User Manual page 44

Chapter 5. Troubleshooting
Other problems
Your computer does not
respond.
The computer does not start
from a device you want.
The connected external device
does not work.
40
•
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.
•
See the Boot menu of the BIOS setup utility. Make sure that
the EFI/Boot device priority in the BIOS setup utility is set
so that the computer starts from the device you want.
•
Press the Novo button when the computer is powered off
and select Boot Device Menu. Then select the device you
want the computer to start from.
•
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 devices
such as an external USB optical disk drive, use external
device power adapter. Otherwise, the device may not be
recognized, or system shut down may result.