Dell OptiPlex GX240 User's Guide - Page 149

9 Update your configuration information by setting the appropriate Drive option (0 or 1) under Drives: Secondary to Auto. See Primary Drive n and Secondary Drive n for more information. 10 Verify that your computer works correctly by running the Dell Diagnostics. Battery A 3.0-V CR2032 lithium 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 10 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 you need to replace the battery, reenter the time and date through system setup and exit the program properly to save the information. Turn off your computer and disconnect it from the electrical outlet for a few hours, and then reconnect the computer, turn it on, and enter system setup. If the date and time are not correct in system setup, replace your battery. You can operate your computer without a battery; however, without a battery, the configuration information is erased if the computer is turned off or unplugged from the electrical outlet. In this case, you must enter system setup and reset the configuration options. Installing Upgrades 147