Display not working

I'm not sure what you have tried but if your GPU has multiple dvi ports on the back I suggest you try plugging your monitor into the other ports and try booting fresh from there. On a previous computer the only port that worked when using just one monitor was the port on the right which was counter-intuitive for me. Give that a shot if you haven't already because I sounds like the rest of the computer is working fine.

Did you get any beeps when you removed the RAM and turned it on?

There's a Speaker cable that comes from most cases and plugs into the mobo. Usually labeled speaker or spkr or something like that.

Usually theres 2 different color ram slots, (I have a black and an orange), try one stick of ram in one color, if that doesn't work, try it in the other.(I literally just had that problem)

the computer booted, turns out i forgot to plug in something from the psu. thanks for the great suggestions guys!