So, I followed the 'Softmod with NDURE through XBOXHDM' tutorial, and the process went flawlessly. After that was done, I tested the dual-boot feature by entering the MS Dash by powering on with the eject button - it booted into the Live Dash. Having no need for this, I changed it to boot into the standard MS Dash by using the NDURE toolset. I rebooted, and everything worked fine. Then I set up the FTP and copied Evox over to the apps folder. I ran Evox and ran the backup. Once finished, I rebooted the Xbox and copied the backup folder (located in the Evox folder) with the EEPROM information on it to my computer. Once that was finished, I played an original Xbox game for a while, and turned off the system when I was finished.
I returned to it a few hours (eight-ish) later. I turned it on (with the power button), and instead of loading UnleashX, it sits at the Xbox bootsplash for a while, the screen flickers and spits out an error 21; the ring is flashing red and green. Then I tried to power it on with the eject button - it booted into MS Dash just fine, and I could play the game fine.
After some frustration (and to no avail), I decided to just start over and pray for the best. I made a new XBOXHDM disc with my EEPROM on it and reinstalled NDURE. It threw out a few "no space left on disk" errors but the UnleashX Dashboard did boot after all. (Now, both buttons boot into UnleashX, but if the system is powered on with the eject button, and the tray is not closed before the Xbox logo appears, it will give me an error 21. Not that it matters as I've no need for the original dash, it's just odd.)
It's been running smoothly since, but I'm worried that I might involuntarily screw it up again somehow. I don't remember what Dash (either MS or UnleashX) I used when I played the game; if it was under MS, is it possible that files in the game had overwritten the UnleashX Dash files, thus resulting in the error? Or could it be something from the system clock battery (if one exists) that broke the mod after being powered down (and unplugged) for such a long time? It was bizarrely spontaneous. Any clarification as to what triggered this would be greatly appreciated. Thanks!
Edited by Dsj, 28 September 2009 - 07:04 AM.