I also have similar issue with my Air 3G dual boot tablet.. While working on it suddenly crashed and now it only goes to bios mode. When I try to repair the tablet using Windows 8.1 installation it is unable to find the drive.
If I try to do a clean re-install it again cant see the drive but to locate the drivers it can show me all the folders in my C drive..
Anyone has any clue how to get the tablet working again ?