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 Support. To change the boot mode, start the BIOS 
setup utility and set boot mode to UEFI or Legacy Support on the boot menu.
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 center?
See “Chapter 3. Getting help and service” in the Lenovo Safety and General Information Guide. 
						

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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 power is on. (Press the Power button again 
for confirmation.)
•If these items are properly set, and the screen remains blank, 
have the computer serviced.
When I turn on the 
computer, only a white 
cursor appears on 
a blank screen.
•Restore backed-up files to your Windows environment or the 
entire contents of your hard disk to its original factory contents 
using the Lenovo OneKey Recovery System. If you still see 
only the cursor on the screen, have the computer serviced.
The screen goes blank 
while the computer is on.•Your screen saver or power management may be enabled. Do 
one of the following to exit from the screen saver or to 
resume from sleep mode:
-Touch the touchpad.
- 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.
BIOS password problems
I forgot my password.•If you forget your user password, ask the system 
administrator to clear your user password.
•If you forget your hard disk drive password, a Lenovo 
authorized servicer cannot reset your password or recover 
data from the hard disk. You must take your computer to a 
Lenovo authorized servicer or a marketing representative to 
have the hard disk drive replaced. Proof of purchase is 
required, and a fee will be charged for parts and service.
•If you forget your administrator password, a Lenovo 
authorized servicer cannot reset your password. You must 
take your computer to a Lenovo authorized servicer or a 
marketing representative to have the system board replaced. 
Proof of purchase is required, and a fee will be charged for 
parts and service. 
						

							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 battery pack 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 computer is in sleep mode, connect the AC power adapter 
to the computer, then press any key or the Power button.
•If the system still does not return from sleep mode, stops 
responding, or cannot be turned off, reset the computer. 
Unsaved data may be lost. To reset the computer, press and 
hold the Power button for four seconds or more. If the 
computer is still not 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 battery pack, 
and the battery status indicator is on, press F12 (   ) to 
make the screen brighter.
- If the power indicator is blinking, press the Power button to 
resume from sleep mode.
- If the problem persists, follow the solution in the next 
problem “The screen is unreadable or distorted.”
- Press F9 (   ) to confirm whether the backlight of the 
LCD screen has been turned off.
The screen is unreadable 
or distorted.•Make sure that:
- The display device driver is installed correctly.
- The screen resolution and color quality are correctly set.
- The monitor type is correct.
Incorrect characters 
appear on the screen.•Are the operating system or programs installed correctly? 
If they are installed and configured correctly, have the 
computer serviced. 
						

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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 a fully 
charged battery pack.•The surge protector in the battery pack might be active. Turn 
off the computer for one minute to reset the protector; then 
turn on the computer again.
A hard disk drive problem
The hard disk drive does 
not work.•Make sure that the hard disk drive is included in the Boot 
menu in the BIOS setup utility correctly.
OneKey Recovery System problems
Backup cannot be made.•Make sure that you are currently using a Windows operating 
system.
•There may not be enough space to store the backed-up data. 
You will need to free more hard disk space on your backups 
partition.
Failure to restore system 
partition to factory default.•The system partition (e.g. the partition size or the drive 
capacity of C) has been modified. 
						

							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 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. Make sure that the device is included in the 
Boot menu in the BIOS setup utility correctly.
•While turned off, press the Novo button to select the device 
you want the computer to start from.
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 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. 
						

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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:
•The illustrations used in this appendix are for the Lenovo Z51-70, unless otherwise stated.
•The following steps about upgrading and replacing devices are the same for the Lenovo Z41-70/Z51-70/
ideapad 500-14ACZ/ideapad 500-15ACZ.
a
111 
						

							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
34
3