Possible busted board?

[Ganjaholic]

I have the P5N32-e-sli and have having difficulties gaining a stable system, my pc kept on freezing and i put this down to my combo of ram and board, but i got 2GB Corsair dominators tried them dual channel, no post, tried A1+A2, no post i never tried them in b1+b2 (that was the only 2 slots my geil would run in until now),so i tried my geil in all slots and got the same results, no post in A1+B1 or A1+A2,thing is my board ran fine for months in dual channel then i got freeze up's, and i changed them to different slots(B1+B2 it ran for a cpl of weeks then got lock up's again so it seems i have ran out of slots lol, so is it my mobo thats busted? nothing is overclocked any ideas?

cheers guys sorry for the long post.