No control alt delete

I picked up a non functional WS from a friend.
He claimed to have no knowledge as to what was wrong. Problem: The control alt delete function does not work. I thought the CMOS was corrupt. I then find that no matter what I put in the CMOS setup, the WS will not recognize the floppy disc. I changed out the HDD and the floppy. Both work on other motherboards. Where should I look? (The mother board seems to be working properly).
Bill