Lenovo IdeaPad U455 User Manual page 61

A Password problem
I forgot my password.
Keyboard problems
A number appears when
you enter a letter.
Sleep or hibernation problems
The computer enters sleep
mode unexpectedly.
• If you forget your user password, you must take
your computer to a Lenovo authorized servicer or a
marketing representative to have the password
changed.
• If you forget your HDD 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.
The numeric lock function is on. To disable it, press
•
Fn + F8.
• If the processor overheats, the computer automatically
enters sleep mode to allow the computer to cool and to
protect the processor and other internal components.
Check the settings for sleep mode.
Chapter 5. Troubleshooting
47