Lenovo Flex 2-15D User Guide - Lenovo Flex 2-14, 2-14D, 2-15, 2-15D - Page 42

Troubleshooting, Other problems, Boot Mode, Legacy, Support - boot from usb

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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. I need to start the computer from a connected device, but the device does not appear on the boot device list. • Check the boot mode setting in the BIOS setup utility. If Boot Mode is set to UEFI, make sure that the device or the medium in the device supports UEFI boot. If the device or the medium in the device does not support UEFI boot, set Boot Mode to Legacy Support. If the device still does not appear in the boot device list, replace with a new device or medium. 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 may not be recognized, or system shut down may result. 38

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38
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.
I need to start the computer
from a connected device,
but the device does not
appear on the boot device
list.
•
Check the boot mode setting in the BIOS setup utility.
If
Boot Mode
is set to
UEFI
, make sure that the
device or the medium in the device supports UEFI
boot. If the device or the medium in the device does
not support UEFI boot, set
Boot Mode
to
Legacy
Support
. If the device still does not appear in the
boot device list, replace with a new device or
medium.
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 may not be recognized, or system shut down
may result.