The original XBox is a fantastic device. It contains an acceptably specified CPU, some RAM, a hard disk, ethernet and TV output. It is also dirt cheap, and thanks to the invention of modchips, able to be turned into a useful media centre.
I now own two XBoxes, both chipped and running XBox Media Center, with video being loaded off my Linux server. Chipping an XBox is a very easy thing to do, well documented on the Internet. What isn't documented is when it fails.
Modding my first XBox was easy, it all worked exactly like it should have. My second XBox was more tricky.

What follows is not a Howto document explaining the process, this is my experience installing a Duo X2 modchip which was faulty, and then replacing it with an Xecutor 2.5 modchip which worked.

I made a little gallery of amusing images which you can find by following this link.