Lenovo Ideapad 100s 11iby User Guide

Chapter 4. Troubleshooting
17 Getting help
When do I need to change the boot mode?
The default boot mode for your computer is UEFI mode. If you need to install a legacy operating 
system, such as Windows, Linux or Dos, etc. (that is, any operating system before Windows 8) 
on your computer, you must change the boot mode to Legacy Support. The legacy operating 
system, such as Windows, Linux or Dos, etc. cannot be installed if you dont change the boot 
mode.
How can I contact the customer support...

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Chapter 4. Troubleshooting
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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 computer, and 
plugged into a working electrical outlet.
- The computer power is on. (Press...

Chapter 4. Troubleshooting
19
Sleep problems
The critical low-battery 
error message appears, 
and the computer 
immediately turns off.•The battery power is getting low. Connect the AC power 
adapter to the computer.
The computer enters sleep 
mode immediately after 
Power-on self-test 
(POST).•Make sure that:
- The battery pack 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...

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Chapter 4. Troubleshooting
Sound problems
No sound can be heard 
from the speaker even 
when the volume is 
turned up.•Make sure that:
- The Mute function is off.
- The combo audio jack is not being used.
- Speakers are selected as the playback device.
Battery pack problems
Your computer shuts down 
before the battery status 
indicator shows empty.
-or-
Your computer operates 
after the battery status 
indicator shows empty.•Discharge and recharge the battery pack.
The computer does not 
operate with...

Chapter 4. Troubleshooting
21
Other problems
Your computer does not 
respond.•To turn off your computer, press and hold the Power button 
for four 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.
The computer does not 
start from a device you 
want.•See the Boot menu of the BIOS setup utility. Make sure that 
the BIOS...

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Trademarks
The following terms are trademarks or registered trademarks of Lenovo in the United States, 
other countries, or both.
Lenovo
ideapad
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. 

©Lenovo China 2015
en-US
Rev. RP01