Dell Mini Tower System manual Replacing the System Battery

6.Insert the new SEC cartridge/heat sink assembly into the system board connector.

Press the SEC cartridge release latches outward until they snap into position. Orient the assembly with the heat sink facing toward the right (as you face the front of the chassis), and press the SEC cartridge firmly into its connector until it is fully seated. You must use up to 25 pounds of force to fully seat the SEC cartridge/heat sink assembly in the connector.

7.Slide the heat sink clips back into position.

8.If your upgrade kit included an airflow shroud, install it over the SEC cartridge/heat sink assembly.

Fit the mouth of the shroud into the alignment slots on the sides of the cooling fan. Then squeeze the tabs on the top of the shroud and lower it down until the clips under the tabs engage onto the top of the heat sink.

9.If necessary, change the microprocessor speed jumper setting (see Figure 5-6 to locate the system board jumpers).

The microprocessor speed jumper should be set for the installed microprocessor’s rated internal speed. For example, for a 300-megahertz (MHz) Intel Pen- tium II processor, a jumper plug should be installed on the pins labeled “300MHZ.” (See Table 5-1 for more information.)

10.Rotate the power supply back into position.

11.Replace the computer cover; reconnect your com- puter and peripherals to their power sources, and turn them on.

As the system boots, it detects the presence of the new microprocessor and automatically changes the system configuration information in the System Setup program.

12.Enter the System Setup program, and confirm that the Microprocessor category correctly identi- fies the installed microprocessor.

See Chapter 2, “Using the System Setup Program.”

13.Run the Dell Diagnostics to verify that the new microprocessor is operating correctly.

See your Diagnostics and Troubleshooting Guide for information on running the Dell Diagnostics and troubleshooting any problems that may occur.

Replacing the System Battery

A3.0-volt (V) CR2032 coin-cell battery installed on the system board maintains system configuration, date, and time information in a special section of memory.

The operating life of the battery can extend up to ten years. The battery may need replacing if an incorrect time or date is displayed during the boot routine along with a message such as:

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 the battery needs replacing, reenter the time and date through the System Setup program (not through the MS-DOS time and date commands) and exit the program properly to save the information (see Chapter 2, “Using the System Setup Program,” for instructions). Turn off your system and disconnect it from alternating current (AC) power for a few hours; then reconnect and turn on your system. Enter the System Setup program. If the date and time are not correct in the System Setup program, replace your battery.

You can operate your system without a battery; however, without a battery, the system configuration information is erased if the system is turned off or unplugged from AC power. In this case, you must enter the System Setup pro- gram and reset the configuration options.

WARNING: There is a danger of the new battery exploding if it is incorrectly installed. Replace the battery only with the same or equivalent type rec- ommended by the manufacturer. Discard used batteries according to the manufacturer’s instructions.

Installing System Board Options 6-9