1. Remove any media from the drives and turn off all connected devices and the computer. Then,disconnect all power cords from electrical outlets and disconnect all cables that are connected to thecomputer.2. Remove the computer cover. See “Removing the computer cover” on page 82.3. Locate the coin-cell battery. See “Computer components” on page 31.4. Remove the coin-cell battery as shown.Figure34. Removing the coin-cell battery5. Install the new coin-cell battery as shown.Figure35. Installing the coin-cell battery6. Reinstall the computer cover and reconnect cables to your computer. See “Completing the partsreplacement” on page 113.7. Turn on the computer and all connected devices.Note: When the computer is turned on for the first time after replacing the coin-cell battery, an errormessage might be displayed. This is normal after replacing the coin-cell battery.8. Use the Setup Utility program to set the date, time, and any passwords. See “Using the Setup Utilityprogram” on page 57.Replacing a memory moduleAttention: Do not open your computer or attempt any repair before reading and understanding the Chapter1 “Read this first: Important safety information” on page 1.The following table provides information about the memory module installation rules. The “X” mark indicatesthe memory slot(s) into which the memory module(s) should be installed in different situations. The numbers1 and 2 indicate the installation sequence. To locate the memory module slots, see “Parts on the systemboard” on page 34.Memory modules DIMM 1 DIMM 2One memory module XTwo memory modules X XTo replace a memory module, do the following:Chapter 9. Installing or replacing hardware 99