KYVINE

Guys, I think I just post another thread with pretty much the same content but anyways...So I got the 2GB GTX 680M card in replacement for my 6990M. The seller tested it on his P150HM and it was plug and play. But when I booted it yesterday, my computer stuck at start-up screen (for 2min or so without any boot options which is unusual), MADE 3 BEEPS, and jumped to Windows 8 loading screen then immediately black screen all the way. Anyone has any clue what's going on? I've read some posts saying it has something to do with the vbios but I'm new to the field so don't know much about the details of blindflashing etc. So if anyone has relevant information it would be much appreciated!