4 Upgrading your computer60into the socket, turn the DDR2 DIMM around and try to insertit again.To reconfigure your computerYour computer automatically detects the amount of memory installed. Run theBIOS utility to view the new value for total system memory and make a noteof it.Replacing the Veriton 3900Pro's hard diskFollow these steps to replace your computer’s hard disk:1 Remove the computer cover (see page 53).2 Detach all cables connected to the CD or DVD drive, the 3.5-inch floppydrive and hard disk.