Ok, I used the crucial.com scanner to find out the correct ram upgrade for my pc., installed the ram now my pc wont boot. It turns on for about 2 seconds, then downs for about 2 seconds, then back up again without booting, and all I have is a blank screen. I currently have 1 256mb chip in slot 2, that seems to work fine, I tried the new 1gb chip in slot 1 and get nothing. Pc still reads only 256mb ram. So I remove the 256mb chip and put the 1gb chip in its place and thats when the pc wont boot. Any help would be great.