It sounds like nForce2 BIOS corruption issue that I have been hearing about (see link below). However, I haven't heard about people being able to get into BIOS setup after the problem occurs, only that they can't boot their systems.
<A HREF="http://www.sudhian.com/showdocs.cfm?aid=345" target="_new">http://www.sudhian.com/showdocs.cfm?aid=345</A>
Click <A HREF="http://forums.sudhian.com/messageview.cfm?catid=18&threadid=32537&highlight_key=y&keyword1=bios corruption&FTVAR_MSGDBTABLE=" target="_new">here</A> for thread about the problem.
<b>99% is great, unless you are talking about system stability</b><P ID="edit"><FONT SIZE=-1><EM>Edited by phsstpok on 04/28/03 06:58 PM.</EM></FONT></P>