Faulty xilinx board

Hiya,

I picked up a faulty SB3 up cheap and after initially thinking it was dc related and after some substitution with a working SB3 I've come to the conclusion that it's the xilinx board that's faulty.

I suppose it's possible it has had a bad firmware load but none of the usual IR reset commands work as it seems completely dead.

Does anybody know where I could pick one up?
Is it the same board in an SB2?
is there a hardware reset that can be done on the board itself?

Thanks in advance
Craig