Dell Precision M70 Service Manual - Page 10

Back to Contents Page Coin-Cell Battery Dell Precision™ M70 Service Manual CAUTION: Before you begin any of the procedures in this section, follow the safety instructions in your Product Information Guide. 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 a message appears that is similar to one of the following: Time-of-day not set - please run SETUP programs 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 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 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 that case, you must enter system setup and reset the configuration options. 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. To replace the battery: 1. Record all the screens in the system setup program so that you can restore the correct settings in step 16. 2. Shut down the computer through the Start menu. 3. Ensure that your computer and attached devices are turned off. If your computer and attached devices did not automatically turn off when you shut down your computer, turn them off now. NOTICE: To disconnect a network cable, first unplug the cable from your computer, and then unplug it from the network wall jack. 4. Turn off any attached devices and disconnect them from their electrical outlets. 5. Disconnect the computer power cable from the wall outlet, and then press the power button to ground the system board. CAUTION: To guard against electrical shock, always unplug your computer from the electrical outlet before opening the cover. NOTICE: Before touching anything inside your computer, ground yourself by touching an unpainted metal surface, such as the metal at the back of the computer. While you work, periodically touch an unpainted metal surface to dissipate any static electricity that could harm internal components. 6. Turn the computer over and remove the main battery. 7. Open the small access door in the main battery compartment. 8. Locate the coin-cell battery next to the internal card with Bluetooth® wireless technology (optional). 9. Use your fingers or a blunt, nonconducting object such as a plastic screwdriver to remove the battery by carefully prying it out of its socket . 10. Disconnect the coin-cell battery connector. 11. Insert the replacement battery into the socket and snap the battery into place. 12. Connect the coin-cell battery connector to the replacement battery.