There is instead an error message, "Please remove the incompatible memory module in slot B." I have never inserted anything into the two slots on the left side of the computer, and when I press the eject buttons, the buttons come back out (they are not stuck), but nothing is ejected. Only the two left green lights come on, the AC power & the one next to it. I tried an MS Win98 SE boot disk, which momentarily lit the far right of those 5 on buttons, and asked for the password for the machine, but then nothing, the 5th light went out, the screen blank, and I can't duplicate the effect. I got behind on backing up the hard disk, and now have my most recent work only on the 4600 Sat Pro hard disk. I am not a computer-savvy person & have no experience disassembling a computer. Many thanks to anyone who might be able to help. Joseph