Dell Precision� Workstation 650 and Dell Precision
Workstation 450 Service Manual
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:
Locate the battery socket. For the Dell
Precision 450 computer, see "System Board
Components" or for the Dell Precision 650 computer, see "System
Board Components" or see the system board label inside your
computer.
NOTICE: If you pry
the battery out of its socket with a blunt object, be careful not to touch
the system board with the object. Ensure that the object is inserted
between the battery and the socket before you attempt to pry out the
battery. Otherwise, you may damage the system board by prying off the
socket or by breaking circuit traces on the system board.
Remove the battery by carefully prying it
out of its socket with your fingers or with a blunt, nonconducting object
such as a plastic screwdriver.
Insert the new battery into the socket
with the side labeled "+" facing up, and snap the battery into
place.
NOTICE: To connect
a network cable, first plug the cable into the network wall jack and then
plug it into the computer.
Close the computer cover, and plug your
computer and devices into electrical outlets.
Enter system setup and restore the
settings.
Properly dispose of the old battery. For
more information see your System Information Guide.
