Adding and Replacing Parts 249CAUTION: A new battery can explode if it is incorrectly installed. Replace thebattery only with the same or equivalent type recommended by the manufacturer.Discard used batteries according to the manufacturer’s instructions.NOTICE: To prevent static damage to components inside your computer, dischargestatic electricity from your body before you touch any of your computer’s electroniccomponents. You can do so by touching an unpainted metal surface on thecomputer.About the BatteryA coin-cell battery maintains computer configuration, date, and timeinformation. The battery can last several years.The battery may need replacing if you have repeatedly reset the time and dateinformation after turning on the computer or if one of the following messagesappear: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 battery, re-enter the time anddate in System Setup and exit the program to save the information. Turn offyour computer and disconnect it from the electrical outlet for a few hours;then reconnect the computer, turn it on, and enter System Setup (see"Entering System Setup" on page 81). If the date and time are not correct inSystem Setup, replace the battery.You can operate your computer without a battery; however, without a battery,the configuration information is erased if the computer is turned off orunplugged from the electrical outlet. In this case, you must enter System Setup(see "Entering System Setup" on page 81) and reset the configuration options.Removing the BatteryIf you have not already done so, make a copy of your configurationinformation found in System Setup (see "System Setup" on page 81).
