Have you tried testing with a USB keyboard or another PS/2 keyboard ? (try testing with all the USB ports you have).
And you mentioned that this didn't happen before, so did it happen all of a sudden ?
No I have not. This happened all of a sudden after moving the computer from one location to another. I wanted to boot into setup so I can change boot order to install win xp pro.
I will try another KB . I have been using this kb and it works on my other computers. I will try another anyway just to be sure. Tks