Have you tried to clear the Cmos? MANY times locking up the Bios can be handled by clearing the cmos.
MOST modern motherboards do not come with a socket holding the BIOS since it is an eeprom. Some motherboards come with a Bios recovery mode where you can flash a new bios when your old one is the wrong one or is corrupted etc. You should look and see what the maker of the board says. If you are lucky and have a board such as an asus board that comes with dual bios chips you would just revert to the old one.
Worst case you are likely better off buying a new motherboard unless you bought an expensive one.