After checking memory was seated properly and motherboard and DVD/CD drives were secure (as Ive been having intermittent boot up problems) I treid to start PC again and its giving a intermittent beep and both drives DVD and CD are showing green lights. The PC does not boot and the beep continues.
Posting back here as I have another problem with the same PC,
the day after doing the move/reseat memory I switched on the PC and left the room for 10 min, when I returned the PC was totally dead, no sound no life at all.
I have just about given up on this PC and was going to give it to someone who might use it for spares, but would appreciate thoughts on what might be the problem here.