Lenovo Ideapad 300s 11ibr User Guide

							Chapter 3. Troubleshooting
17
BIOS setup utility
What is the BIOS setup utility?
The BIOS setup utility is ROM-based software. It communicates basic 
computer information and provides options for setting boot devices, 
security, hardware mode, and other preferences.
How can I start the BIOS setup utility?
To start the BIOS setup utility:
1Shut down the computer.
2Press the Novo button and then select BIOS Setup.
How can I change the boot mode? (on select models)
There are two boot modes: UEFI First and Legacy Support. To change the 
boot mode, start the BIOS setup utility and set boot mode to UEFI First or 
Legacy Support on the boot menu.
When do I need to change the boot mode? (on select models)
The default boot mode for your computer is UEFI First mode. If you need 
to install a legacy Windows operating system on your computer, you must 
change the boot mode to Legacy Support. The legacy Windows operating 
system cannot be installed if you dont change the boot mode.
Getting help
How can I contact the customer support center?
See “Chapter 3. Getting help and service” of Lenovo Safety and General 
Information Guide. 
						

							Chapter 3. Troubleshooting
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Troubleshooting  - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -  - - - - - - - - - - - - - - - - - - - - - 
Display problems
When I turn on the 
computer, nothing appears 
on the screen. •
If the screen is blank, make sure that:
- The AC power adapter is connected to the c
 omputer, and the power cord is plugged into a 
working electrical outlet.
- The computer power is on. Press the Power button  again fo
 r confirmation.
• If these
 items are set correctly, and the screen remains 
blank, have the computer serviced. 
When I turn on the 
co
 mputer, only a white 
cursor appears on a blank 
screen.  •
Restore backed-up files to your Windows 
environment or the entire co ntents of your hard disk 
to its original factory co ntents using the Lenovo 
OneKey Recovery system. If  you still see only the 
cursor on the screen, have the computer serviced.
The screen goes blank 
wh
 ile the computer is on. •
Your power management is enabled. Do one of the 
following to resume from sleep mode:
- Press any key on the keyboard.
- Press the Power button.
-Press  F9 (
) to confirm whether the backlight of 
the LCD screen has been turned off.
Sleep problems
The critical low-battery error 
message appears, and the 
computer imme diately turns 
off. •
The batte ry power is getting low. Connect the AC 
power adapter to the computer.
The computer enters sleep 
mode
  immediately after 
Power-on. •
Make sur e that:
- The battery is charged.
- The operating temperature  is
  within the acceptable 
range. See “Chapter 2. Use and care Information” in 
the  Lenovo Safety and General Information Guide .
Note:If the battery is charged and the temperature is within range, have the computer 
serviced. 
						

							The computer does not 
return from sleep mode and 
the computer does not 
work. •
If your co mputer is in sleep mode, connect the AC 
power adapter to the computer, then press the 
Windows button or the Power button.
• If the syst
 em still does no t return from sleep mode, 
your system has stopped responding, and you cannot 
turn off the computer; reset the computer. Unsaved 
data may be lost. To reset the computer, press and 
hold the Power button for  eight seconds or more. If 
the computer still does n ot reset, remove the AC 
power adapter.
Display panel problems
The screen is blank.  •Do the following:
- If you are using the AC power adapter or the b
 attery, and the battery status indicator is on, press 
F12  (
) to make the screen brighter.
- If the power indicator is blinking, press the Power  butto
 n to resume from sleep mode.
-Press  F9 (
) to confirm whether the backlight of 
the LCD screen has been turned off.
- If the problem persists, follow the solution in the  next pr
 oblem “The screen is unreadable or 
distorted.”
The screen is unreadable or 
di
 storted. •
Make sur e that: 
- The screen resolution and color quality are correctly  set. 
- The monitor type is correct.
Incorrect characters appear 
o
 n the screen. •
Is the operating system or programs installed 
correctly? If they are installed and configured 
correctly, have the computer serviced.
Sound problems
No sound can be heard 
from the speakers even 
when the volume is turned 
up. •
Make sur e that:
- The Mute function is off.
- The combo audio jack is not being used.
- Speakers are selected as the playback device. 
Chapter 3. Troubleshooting
19 
						

							Battery problems
Your computer shuts down 
before the battery status 
indicator shows empty.
-or-
Your computer operates 
a fte

r the battery status 
indicator shows empty. •
Rechar ge the battery.
Other problems
Your computer does not 
respond. •
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 wh en it ente
 rs sleep mode
during a communication operation. Disable the sleep
timer when you are working on the network.
The connected external 
de vice doe

s 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  high power consumption external
de
 vices, such as an external USB optical disk drive,
use an external device power adapter. Otherwise, the
device may not be recogn ized, or the system may
shut down as a result.
Chapter 3. Troubleshooting
20 
						

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Trademarks
The following terms are trademarks or registered trademarks of Lenovo in the 
United States, other countries, or both.
Lenovo
OneKey
Microsoft and Windows are trademarks of Microsoft Corporation in the United 
States, other countries, or both.
Other company, products, or service names may be trademarks or service marks 
of others. 
						

							en-US
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