I currently have my second MBP that I got from Macmall and both in a matter of two weeks have had similar issues. The first I managed to get returned and replaced, that is a seperate and complicated story in and of itself. This particular issue started with a boot up sequence that was taking about 5-6 mins. After going through the drill with Applecare thought I could restore using Time Machine. That's when I found out that the FW400 port no longer worked to power my Oyen Digital 250G FW drive. Any thoughts as to what might be the problem? This is my second MBP and Oyen Digital FW drive. I had them both replaced!