I think the problem has been found, Last night i performed some windows updates on that machine, been reading through the error logs all day and googled to my hearts content, The server itself is online, its jut not connecting to the network, Checked the card and the cables, no sign of anything wrong with that. We're going to try a system rollback shortly to see if that sorts it out. (don't worry. no data is effected)
Thanks for your patience everybody.