I have BIOS 0099. When I uncheck the audio in the BIOS, it won't boot. I see the "Intel inside" screen and then it hangs. It doesn't display the function key menu. My guess is it wants to play the Intel jingle but it can't because the audio is disabled. So it just sits there.
The only way to recover is press the "back to BIOS" button. This gets me into the BIOS setup.
You can get to the audio enable/disable by clicking Devices >> Onboard Devices.
BIOS bug?