28
Lithium (CMOS/Clock) Battery
The battery is located near the bottom front of the system board. See the system board
diagram in Chapter 5, “System Board,” for details.
After you remove the battery, the system will lose its operating parameters stored in CMOS.
As a result, the system BIOS parameters are lost. Parameters include date, time, hardware
configuration, and other data.
After you install the new battery, you must reset the date and time and reconfigure the BIOS.
See the System Setup for details on updating and configuring the BIOS.
WARNING
There is a danger of explosion if the battery is incorrectly replaced.
WARNING
Replace the battery with the same or equivalent type only, as recommended by the
battery manufacturer. Dispose of used batteries according to the battery
manufacturer's instructions.
To replace the battery:
1. Remove any expansion cards that restrict access to the battery. See the “Expansion
Cards” above for details.
2. Note the positive orientation of the battery. Carefully remove the discharged battery by
grasping it firmly and pulling it out of the socket.
3. Install the new battery in the same orientation as the old battery.
4. Dispose of the battery according to the manufacturer’s instructions.
5. Install the expansion cards that you removed.
LEDs, Light Pipe, and Power Switch
See the system board diagram in Chapter 5, “System Board,” for connector and socket
locations. See also the “Cable Routing and Pinouts” section in Chapter 5 for LED and power
switch cable and connector details.
To replace an LED:
1. Remove the internal bay disk drives. See the “Internal Bay Disk Drives” section for
details.
2. Note the locations of each of the LEDs on the light pipe.
3. Remove the LED from its mount on the light pipe, then disconnect the LED cable from its
connector on the system board.
