I have a similar problem...
I am trying to upgrade a friends Xbox. He has a 1.6 (crystal) and Xenium ICE.
I did the install...initially everything was great.
The problem I think started when I had the unit off for more than 3 hours (I didn't think it was this long)...anyway, I could boot into XBMC, etc... no problem...What was a problem however was that I could not boot into MSdash (05 error). I realized I had not locked the hard drive. Did than, rebooted to MSdash and then error 13...Since I had just copied from one of my old Xbox hard drive's I thought I might have screwed up the msdash on that hard drive (which I had done I believe)....anyway...this is when the problems started...
I tried slayers msdash re-install and it seemed to work but I ended up with the same problem. Therfore, silly me, I decided to update the xenium OS.
I tried this in recovery mode (switch on Xenium set to show the black mark) but it just makes the LED on the Xenium go red and the LED on the power button flashes yellow. I put in the burnt ISO recovery file (XeniumOS_2.3.0.iso) but the dvd reader in the xbox reads it but does nothing with it....
Above someone said that if you have a 1.6b the recovery mode will not work...is this true??? They had xenium test OS 2 when I originally had it working...I have another Xbox (1.1 version)...should I try it in this Xbox as someone else has suggested (I would rather not as I would have to modify stuff to make the white Xenium work!)...
Can someone help me?
Thanks.