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4. Secure the card’s metal bracket to the chassis back panel with a screw.
Removing the PCI Express* x8 Card
Follow these instructions to remove the PCI Express* x8 card from the RM:
1. Observe the precautions in "Safety Information" at the beginning of this document.
2. Remove the screw that secures the card’s metal bracket to the chassis back panel.
3. Push back on the RM lever until the retention pin completely clears the notch in the card.
4. Pull the card straight up.
Replacing the Backup Battery
A coin-cell battery (CR2032) powers the real-time clock and CMOS memory. When the server is
not AC powered-on, the battery has an estimated life of three years. When the server is powered-
on, the standby current from the power supply extends the life of the battery. The clock is accurate
to ± 13 minutes/year at 25 ºC with 3.3 VSB applied.
When the voltage drops below a certain level, the BIOS Setup program settings stored in CMOS
RAM (for example, the date and time) might not be accurate. Replace the battery with an
equivalent one. Figure 15 shows the location of the battery.
1. Observe the precautions in "Safety Information" at the beginning of this document.
2. Turn off all peripheral devices connected to the server. Turn off the server.
3. Disconnect the AC power cord from the server.
4. Remove the server’s cover and locate the battery.
5. Insert the tip of a small flat bladed screwdriver, or an equivalent, under the tab in the plastic
retainer. Gently push down on the screwdriver to lift the battery.
6. Remove the battery from its socket.
7. Dispose of the battery according to local ordinance.
8. Remove the new lithium battery from its package, and, being careful to observe the correct
polarity, insert it in the battery socket.
9. Close the chassis.
10. Run Setup to restore the configuration settings to the RTC.
Intel® Entry Server Board SE7221BA1-E User Guide 15