The other night, I bought an Xbox, brought it home, and set up a soft-mod using xboxhdm, had it up and running in 20 minutes. No problem. It was a 1.6
Today, I went to the same store, bought another Xbox, (both of these are brand new, by the way) and came home, set it up again, and when I hook the HDD back up to the Xbox, it won't boot. It doesn't frag, and I don't get an error screen. After the flubber, it comes up with some scrambled lines on the screen and just sits there. I let it sit for awhile to see if I can hotswap it again, and when I pull the IDE from the back of the HDD, it promptly switches to error 21.
Is this Xbox different, or did I screw something up? I've done this lots of times without a problem, and xboxhdm did it's thing the same way it does everytime, so I'm having a hard time believing I did something wrong.