So, I had a computer that I thought was dead. I was bored today so I decided to play around with it. I messed with some things and ended up being able to boot up after I took all the ram out and put just one stick back in. My mobo has four ram slots and I have four sticks of ram (3 sticks of 1gb and one stick of 2gb) all pc2 and 6400u. Now I cannot get the computer to boot with all four sticks in the computer... I have tried every combo every slot. I am fairly certain that all of my slots and ram is in working condition. I currently have the 2gig in slot 4 and a 1gig in slot 3, and it works. If I add any more it wont boot up. It also seems to be pretty random when it will boot. What can I do!?