
Turned out that the box had two issues, both of which were relatively easy to fix..
First, the original hard drive in the debug kit was dead. Putting a locked retail drive in
the unit didn't help (but I had forgotten it was locked). After screwing around with the a18/a19 pins (to try other banks of the TSOP), I threw a hard drive that was laying around from an old PC, and voile I could boot my recovery disc. Installed a fresh HD/ROM image from the recovery disc, and the machine was more or less functional again.
However, it was still in black and white (and the screen was noticably stretched). After
getting into the MS dashboard and looking at the settings, it seems that this debug kit thought it was a PAL machine. I wasn't quite sure how I could fix that (since I couldn't boot up my Evox disc or the Enigmah videomode switcher), however the XDK Launcher lets you change all kinds of things, so thanks for that Redmond.
So now I've got (what appears to be) a functional debug kit. The 5558 recovery disc also lets you convert the machine to a retail box, and I tried that, but it still couldn't boot any retail games. So I'm curious what the purpose of this conversion is..
Anyway, thanks again..
-j