I suggest using the SEARCH function over on . I believe this problem surfaced there some months back but I do not recall the solution.
You could, of course, purchase the cable to plug into the MSS motherboard and get VGA/Kbd/Mouse access to the MSS and, with that, the ability to access the bios settings. Should be able to get that with a SEARCH over there as well.
(For some reason I am unable to get to my MSS bookmarks at the moment and can't provide the links. Sorry!)