|You probably can't recover from that unless you're getting a BOOT BLOCK BIOS or similar message on the screen.|
If your bios chip is removable, you can order another one, already flashed with the latest bios update, and replace it yourself.
If your bios chip is soldered into the mboard, which is usually the case these days, you can remove the mboard and ship it to a professional who will replace the bios chip with one that is already flashed with the newest bios update, and he'll ship it back to you.
However, that may cost you more than a used mboard for your model.
E.g. If you're in North America, lots of info and both services are available here: