Dell PowerEdge 1750 - Manual (Page 57)

Installing a Power Supply
1. To install the replacement power supply, align the stud on the side of the power supply with the corresponding notch in the chassis wall, and then
lower the power supply into the chassis. See Figure 6 -13 .
2. Slide the power supply toward the PDB until the power supply connector is fully seated in the PDB connector.
Replacing the System Battery
The system battery is a 3.0-V, coin-cell battery that maintains system configuration, date, and time information in a special section of memory when you turn
off the system. The operating life of the battery ranges from 2 to 5 years, depending on how you use the system (for example, if you keep the system on most
of the time, the battery gets little use and thus lasts longer). You may need to replace the battery if an incorrect time or date is displayed during the boot
routine.
You can operate the system without a battery; however, the system configuration information maintained by the battery in NVRAM is erased each time you
remove power from the system. Therefore, you must re-enter the system configuration information and reset the options each time the system boots until you
replace the battery.
To replace the battery, perform the following steps.
1. Enter the System Setup program and, if possible, make a printed copy of the System Setup screens. See "Using the System Setup Program" in the
User's Guide.
2. Turn off the system, including any attached peripherals, and disconnect the system from the electrical outlet.
3. Open the system covers. See " Opening the System Covers " in "Troubleshooting Your System."
4. Remove the system battery. See Figure A -3 for the battery connector location.
a. Support the battery connector by pressing down firmly on the positive side of the connector. See Figure 6 -14 .
b. While supporting the battery connector, press the battery toward the positive side of the connector and pry it up out of the securing tabs at the
negative side of the connector.
Figure 6-14. Installing the System Battery
CAUTION: Only trained service technicians are authorized to remove the system cover and access any of the components inside the system. See
your System Information Guide for complete information about safety precautions, working inside the computer, and protecting against
electrostatic discharge.
CAUTION: 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. Discard used batteries according to the manufacturer's instructions.
NOTICE: To avoid damage to the battery connector, you must firmly support the connector while installing or removing a battery.