Lenovo S21e-20 User Manual page 30

Chapter 4. Troubleshooting
Battery problems
Your computer shuts down
before the battery status
indicator shows empty.
-or-
Your computer operates
after the battery status
indicator shows empty.
A storage problem
The storage does not work.
Other problems
Your computer does not
respond.
The computer does not
start from a device you
want.
The connected external
device does not work.
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• Recharge the battery.
• In the Boot menu in BIOS setup utility, make sure
that the storage is included in the UEFI correctly.
• To turn off your computer, press and hold the power
button for eight seconds or more. If the computer still
does not respond, remove 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.
• See the Boot menu of the BIOS setup utility. Make
sure that the UEFI 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. In the Boot menu in the
BIOS setup utility, make sure that the device is
included in the UEFI list.
• 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 high power consumption external
devices, such as an external USB optical disk drive,
use an external device power adapter. Otherwise, the
device may not be recognized, or the system may
shut down as a result.