qbawl

Just a guess, I don't really know for sure, but the beeping is probably the machine's way of teling you that there's an issue with the keyboard. It doesn't know that you can see the board is not connected.

Assuming you're using an external keyboard, does the beep sound with it plugged in? If so, my next guess is that you'll probably need to buy a new keyboard for your machine.

I hope one of the hardware gurus replies you so you'll get a straight answer. As I typed this response I realized that I've never had a need to use an external keyboard or even a monitor; the answer wiill not only help you, but will also teach me something interesting.