If you typed in fdisk /mbr, there's a good chance that while the physical data might still be there, you're never going to be able to access that partition again. That's part of what running fdisk /mbr entails, is overwriting your current MBR with a generic "failsafe" version.
If you have some sort of a recovery CD that will redo the partition table for you, I'd suggest using it. Just be sure to back up everything you don't want to lose on the system, because it will be wiped clean and "restored" to like it was when you first turned it on.
You can also try talking the HP tech support people, but I seriously doubt they'll be of any help at all, and will probably recomend you do the same thing.
I have an Hp Pavilion xt948 and the recovery partition will not load when I press f10. I tryed Fdisk /mbr. Can any one help me??? Please