Alright, I am tired of messing around with it today...

I have three sticks of compatible RAM, which at various times have run in this box. None of them work. One of them allows it to boot, and it promptly freezes. With the other two it chimes on but doesn't even start to boot. What are the chances of three good sticks all being ruined at the same time? I am running out of ideas. It sucks to waste my whole weekend working on this thing and not getting anywhere.