Erasing A Lost Or Forgotten Password (Clearing Cmos) - Lenovo ThinkCentre A52 8157 User Manual

configuration information (including passwords) are lost. An error message is
displayed when you turn on the computer.
Refer to "Lithium battery notice" on page x for information about replacing and
disposing of the battery.
To change the battery:
10. Use the Setup Utility program to set the date and time and any passwords.

Erasing a lost or forgotten password (clearing CMOS)

This section applies to lost or forgotten passwords. For more information about
lost or forgotten passwords, see the ThinkVantage Productivity Center program on
your desktop.
Note: If you are enrolled in the Hardware Password Reset program, refer to
To erase a forgotten password:
1. Turn off the computer and all attached devices.
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User Guide
1. Turn off the computer and all attached devices.
2. Remove the cover. See "Removing the cover" on page 10.
3. Locate the battery. See "Identifying parts on the system board" on page 14.
4. If necessary, remove any adapters that impede access to the battery. See
"Installing adapters" on page 16 for more information.
5. Remove the old battery.
6. Install the new battery.
7. Replace any adapters that were removed to gain access to the battery. See
"Installing adapters" on page 16 for instructions for replacing adapters.
8. Replace the cover, and plug in the power cord. See "Replacing the cover and
connecting the cables" on page 27.
Note: When the computer is turned on for the first time after battery
replacement, an error message might be displayed. This is normal after
replacing the battery.
9. Turn on the computer and all attached devices.
See Chapter 2, "Using the Setup Utility program," on page 29.
"Resetting the hard disk drive and power-on password" on page 31 to reset
your password. If you do clear CMOS or restore Setup Utility defaults, you
will have to re-enroll in the Hardware Password Reset program.