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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.

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The microprocessor speed jumper should be set for the installed micro- processor’s rated internal speed. For example, for a 333-megahertz (MHz) Intel Pentium II processor, a jumper plug should be installed on the pins labeled “333MHZ.” (See Table 5-1 for more information.)

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NOTE: After you remove and replace the cover, the chassis intrusion detector will cause the following message to be displayed at the next system start-up:

ALERT! Cover was previously removed.

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

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

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

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A 3.0-volt (V) CR2032 coin-cell battery installed on the system board maintains sys- tem 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

6-14 Dell OptiPlex GX1 and GX1p Mini Tower Managed PC Systems Reference and Installation Guide