No clue what you just said, but I'd been rapid tapping for a week+ and nothing. Then yesterday it worked for whatever reason. Anyways, no more problem.DEL is the correct key for entering BIOS with that board.
Usually, by disconnecting the data cable from the boot drive(s), a BIOS will default to the setup (BIOS) screen. Have you tried that?
How did the rapid-tapping go?
The chances that:Odd, isn't it?