Lenovo IdeaPad U410 User Manual page 38

Chapter 5. Troubleshooting
Password problems
I forgot my password.
Sleep or hibernation problems
The critical low-battery error
message appears, and the
computer immediately turns
off.
The computer enters sleep
mode immediately after
Power-on self-test (POST).
Note: If the battery is charged and the temperature is within range, have the computer serviced.
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• 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 battery power is getting low. Connect the AC
adapter to the computer, or replace the battery with a
fully charged one.
• Make sure that:
- The battery is charged.
- The operating temperature is within the acceptable
range. See "Chapter 2. Use and care Information" of
Lenovo Safety and General Information Guide.