Upgrading Your System 4-9Figure 4-6. Replacing the Real-Time Clock Battery1. Power off the system and ensure it is disconnected from the AC powersource.2. Open and remove the front door.3. Remove the left side panel and the air duct as described earlier in thischapter.4. If present, remove the protective plastic cover located over the top of thelithium battery.5. Insert the tip of a small flat-bladed screwdriver, or equivalent, under theplastic tab on the San-in plastic retainer.6. Gently push down on the screwdriver to lift the battery (Figure 4-6B).7. Remove the battery from its socket (Figure 4-6C).8. Dispose of the battery according to local ordinance.9. Remove the new lithium battery from its package, and, being careful toobserve the correct polarity, insert it in the battery socket.10. If applicable, reinstall the plastic cover on the lithium battery socket.11. Replace the air duct and left side panel and the front door as describedearlier in this chapter.12. Plug in the system power cord, and turn on the system.13. Run the BIOS Setup to restore the configuration settings to the real-timeclock.
