If you press F2 (it may be the delete key) on startup it should get you into the BIOS (this a swag here).
You just need to go through the bios screens until you see an entry for sound on, change this to sound off. save and exit. |
Unfortunately each individual bios setup tends to be different so I can't be more specific than that. Just browse the bios a few times, without changing anything.
I found this quoted text elsewhere, but it should help you...