Right then prob tracked down eventually one hopes,put all the kit motherboard ect back into its tin house,all connections made,booted ok first time,then started doing its beep thing again after a few boot ups disconnected the front USB panel that seemed to have started the problem and that seems to have sorted it,looks like it was buggad,finger crossed will run it for a couple of hours and see what transpires.
USB socket on the motherboard seem ok.
poxy puters
looks like you are correct Mr S,tiz a pity handy those front USB sockets