Hi Troopy_03
Very few modern motherboards now have the piezo speaker built onto the board. The case (tower) manufacturers were sometimes suppling them with new cases depending on the brand, but unless you buy a top quality tower, that is also now rapidly disappearing.
When stripping down an old system, I always retrieve the speaker if it is removable and reuse on a new system, they last for years!
Chappie
A faulty hard drive will only very rarely stop you accessing the BIOS, you will need to work out whether it has onboard video or a separate video card, if onboard see if you can borrow a card to try, or remove the card and try onboard if available, most bios's will revert to onboard default (if available) if the video card is physically removed from the system, sometimes a constant reboot loop indicates faulty ram, try removing them and try one stick at a time and pay attention to which slots are in use