Lenovo V4400u Notebook - Manual (Page 50)

Backup cannot be made.
Ensure that:
• You are using a Windows operating system.
• There is enough space on your hard disk drive or your solid-state drive to store the backup data.
Fail to restore the system partition to the factory default state.
The cause might be that the partition properties such as the size or the capacity of your system has been
modified.
A password problem
Print these instructions first.
I forgot my password.
Do any of the following:
• If you forget your user password, take your computer to a Lenovo authorized service technician or a
marketing representative to have the password changed.
• If you forget your hard disk drive password, you have to replace the hard disk drive by contacting a
Lenovo authorized service technician or a marketing representative. Proof of purchase is required, and
a fee will be charged for the parts and service.
• If you forget your supervisor password, a Lenovo authorized service technician cannot reset your
password. You have to replace the system board by contacting a Lenovo authorized service technician
or a marketing representative. Proof of purchase is required, and a fee will be charged for the parts
and service.
A sound problem
Print these instructions first.
No sound can be heard from the speaker even when the volume is turned up.
Ensure that:
• The mute function is off.
• The headphone jack is not used.
• Speakers are selected as the playback device.
Other problems
Print these instructions first.
Your computer does not respond.
Do either of the following:
• Turn off your computer by pressing and holding 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.
Do the following:
1. Enter the BIOS program.
36 User Guide