OK I have a theory as to what's going on...
Xnandhealer 0.72 was tested with Multibuilder 0.6 quite extensively before being released. Literally minutes after releasing it (and cracking open a cold one) I discovered that Multibuilder 0.7 had been released - D'oh!
So I grabbed it and did some testing and found quite quickly that there was a stray smc.bin file in the \my360 folder that was causing problems with retail images. However it appeared that Multibuilder removed this when it was first run so I noted it in the Xnandhealer release thread and thought it wouldn't be a big deal.
Now if it's possible that running multibuilder 0.7 or something else can leave an smc.bin file in that \my360 folder then xeBuild will pick it up by default when it's invoked. And of course having a wrong smc ties up with the symptoms of dead xbox / can't detect nand.
This is just speculation but does seem plausible. Still if someone who's had the problem can send me their glitch_image.bin.log file it should confirm it.
Either way I will release an update of xnandhealer tomorrow to ensure any smc.bin file is removed prior invoking xeBuild. In the meantime it should be removed manually if it exists prior to running xnandhealer 0.72.
---------- Post added at 18:30 ---------- Previous post was at 18:27 ----------
What is your CB version on that falcon? I often see posts with problems flashing Falcons and Jaspers but generally people dont post cb number. Some falcons and some jaspers are not glitchable apparently.
http://img802.imageshack.us/img802/8560/identifypowerjtglitchv1.png
Could this be one of them?
True some CBs aren't but I think if it was an un-glitchable CB it would still power up but just not boot successfully.
Worth checking though :smile: