36 | Removing the Coin-Cell BatteryRemoving the Coin-Cell BatteryWARNING: Before working inside your computer, read the safetyinformation that shipped with your computer and follow the steps in"Before You Begin" on page 11. For additional safety best practicesinformation, see the Regulatory Compliance Homepage atdell.com/regulatory_compliance.The coin-cell battery may need replacing if an incorrect time or date is displayed duringthe boot routine along with a message such as:Time-of-day not set - please run SETUP programorInvalid configuration information -please run SETUP programorStrike the F1 key to continue,F2 to run the setup utilityTo determine whether you need to replace the coin-cell battery, reenter the time and datein system setup and exit the program to save the information. Turn off your computer anddisconnect it from the electrical outlet for a few hours; then reconnect the computer, turnit on, and enter system setup. If the date and time are not correct in system setup, replacethe coin-cell battery.You can operate your computer without a coin-cell battery; however, without a coin-cellbattery, the configuration information is erased if the computer is turned off ordisconnected from the electrical outlet. In this case, you must enter system setup andreset the configuration options.WARNING: The battery may explode if installed incorrectly.Replace the battery only with the same or equivalent type.Discard used batteries according to the manufacturer’s instructions.CAUTION: Removing the coin-cell battery resets the BIOS settingsto default. It is recommended that you note the BIOS settings beforeremoving the coin-cell battery.Prerequisites1 Remove the base cover. See "Removing the Base Cover" on page 14.2 Remove the battery pack. See "Removing the Battery Pack" on page 16.3 Remove the fans cover. See "Removing the Fans Cover" on page 29.
