Lenovo Ideapad 500 14acz User Guide

Chapter 4. Troubleshooting
25 BIOS setup utility
Getting help
What is the BIOS setup utility?
The BIOS setup utility is a ROM-based software. It displays 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?
There are two boot modes: UEFI and Legacy...

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Chapter 4. Troubleshooting
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 computer, and 
the power cord is plugged into a working electrical outlet.
- The computer...

Chapter 4. Troubleshooting
27
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 the...

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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
29
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...

30
Appendix A. CRU instructions
Removing the keyboard  - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 
To remove the keyboard, do the following:
1Turn off the computer. Disconnect the AC power adapter and all cables from the computer.
2Close the computer display, and then turn the computer over.
3Remove the screws that secure the keyboard  .
Lenovo Z41-70/ideapad 500-14ACZ
Notes:...

Appendix A. CRU instructions
31
Lenovo Z51-70/ideapad 500-15ACZ
4Turn the computer over, and then open the computer display.
5Push the keyboard with the tip of an unfolded pa per clip (or similar object without a sharp tip) 
through the screw hole on the back cover.
6Loosen the keyboard with fingers  , and then lift the keyboard slightly  .
Lenovo Z41-70/ideapad 500-14ACZ
11
1
bc
3
2
2 

32
Appendix A. CRU instructions
Lenovo Z51-70/ideapad 500-15ACZ
7Disconnect the connectors in the direction shown by arrows   and  . Then remove the 
keyboard.
Lenovo Z41-70/ideapad 500-14ACZ
3
2
2
de
455 

Appendix A. CRU instructions
33
Lenovo Z51-70/ideapad 500-15ACZ
Note:Select models do not have the keyboa rd backlight cable (the dashed area).
45
5 

34
Appendix A. CRU instructions
Removing the optical drive  - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 
Lenovo Z41-70/ideapad 500-14ACZ
To remove the optical drive, do the following:
1Remove the screw shown in the illustration  .
2Gently pull the optical drive out  .
3Remove the screws  , then remove the optical drive bracket in the direction shown by 
arrow .
a
b
2
1
c
d
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3