So on thanksgiving my cat knocked my 360 onto the floor while I was at work. got called about it. kids said it didn't work at all. I came home, turned it on, it registered an e68 error, basically a problem with the HDD. I take out the 320g that I had in it, lo and behold, the xbox turns on just fine, and plays, but it wont register the built in 4gig HDD it had and wont accept the 320g anymore. So I am wondering what if anything I can do.