I had a similar problem, with a Samsung, and got the same error code. Unfortunately, I don't think there is much you can do. If you have the orig FW you might be able to flash it back, maybe using a different computer? I just sent mine in to M$ and they sent me a brand new one. It was OBVIOUSLY tampered with too. I mean the sticker was all but gone and there were marks on the back where I'd had trouble getting it open. I even got a free month of live for it! Hope this helps.