Dell Precision Workstation 450 User Manual page 186

CAUTION: Before you begin this procedure, follow the safety instructions in the
System Information Guide
A coin-cell battery maintains computer configuration, date, and time information. The
battery can last several years.
The battery may need replacing if you have repeatedly reset the time and date information
after turning on the computer or if one of the following messages appears:
Time-of-day not set - please run SETUP program
or
Invalid configuration information -
please run SETUP program
or
Strike the F1 key to continue,
F2 to run the setup utility
To determine whether you need to replace the battery, reenter the time and date in system
setup and exit the program to save the information. Turn off your computer and disconnect
it from the electrical outlet for a few hours; then reconnect the computer, turn it on, and
enter system setup. If the date and time are not correct in system setup, replace the battery.
You can operate your computer without a battery; however, without a battery, the
configuration information is erased if the computer is turned off or unplugged from the
electrical outlet. In this case, you must enter system setup and reset the configuration
options.
CAUTION: A new battery can explode if it is incorrectly installed. Replace the
battery only with the same or equivalent type recommended by the
manufacturer. Discard used batteries according to the manufacturer's
instructions.
NOTE: If you have not already done so, make a copy of your configuration information, found in
system setup.
To replace the battery:
Shut down the computer through the Start menu.
1
Ensure that your computer and attached devices are turned off. If your computer and
2
attached devices did not automatically turn off when you shut down your computer,
turn them off now.
172 B a tt e r y
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