Owners Manual

discovered and enabled before you remove the other PSU. The PSU status indicator turns green to signify that the PSU
is functioning properly.
Figure 35. Installing an AC PSU
1. release latch 2. PSU cable connector
3. PSU 4. power connector
5. PSU handle
Related references
Safety instructions on page 48
System battery
The system battery is used to power the real-time clock and storing the system’s BIOS settings.
Replacing the system battery
Prerequisites
NOTE:
There is a danger of a new battery exploding if it is incorrectly installed. Replace the battery only with the same or
equivalent type recommended by the manufacturer. For more information, see the safety information that shipped with your
system.
CAUTION: Many repairs may only be done by a certified service technician. You should only perform
troubleshooting and simple repairs as authorized in your product documentation, or as directed by the online or
telephone service and support team. Damage due to servicing that is not authorized by Dell is not covered by
your warranty. Read and follow the safety instructions that are shipped with your product.
1. Follow the safety guidelines listed in the Safety instructions section.
2. Follow the procedure listed in the Before working inside your system section.
3. Remove the cooling shroud.
Steps
1. Locate the battery socket. For more information, see the Jumpers and connectors section.
CAUTION:
To avoid damage to the battery connector, you must firmly support the connector while installing
or removing a battery.
92 Installing and removing system components