Dell Precision 490 Desktop User's Guide - Page 31

Back to Contents Page Battery Dell Precision™ Workstation 490 User's Guide About the Battery Replacing the Battery CAUTION: Before you begin any of the procedures in this section, follow the safety instructions in the Product Information Guide. CAUTION: To guard against electrical shock, always unplug your computer from the electrical outlet before opening the cover. CAUTION: A new battery can explode if it is incorrectly installed. Replace the battery 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, discharge static electricity from your body before you touch any of your computer's electronic components. You can do so by touching an unpainted metal surface on the computer. About the Battery A coin-cell battery maintains computer configuration, date, and time information. The battery can last several years. The battery may need replacing if you have repeatedly reset the time and date information after turning on the computer or if one of the following messages appear: 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, re-enter the time and date in system setup and exit the program to save the information. Turn off your computer and disconnect it from the electrical outlet for a few hours; then reconnect the computer, turn it on, and enter the system setup program (see System Setup). If the date and time are not correct in system 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 or unplugged from the electrical outlet. In this case, you must enter the system setup program (see System Setup) and reset the configuration options. Replacing the Battery 1. If you have not already done so, write down the configuration information found in system setup (see System Setup). 2. Follow the procedures in Before You Begin. 3. Remove the computer cover (see Removing the Computer Cover). 4. Locate the battery socket (see System Board Components). 5. If necessary, disconnect any cables that block access to the battery socket. NOTICE: If you pry the battery out of its socket with a blunt object, be careful not to touch the system board with the object. Ensure that the object is inserted between the battery and the socket before you attempt to pry out the battery. Otherwise, you may damage the system board by prying off the socket or by breaking circuit traces on the system board. NOTICE: To avoid damage to the battery connector, you must firmly support the connector while removing the battery. 6. Support the battery connector by pressing down firmly on the positive side of the connector. 7. While supporting the battery connector, press the battery tab away from the positive side of the connector and pry the battery up out of the securing tabs at the negative side of the connector.