Furthest i could get for the longest time was factory reset and wipe cache, but same result, phone would not boot past the droid 'eye' video (which played continuously until the battery died, i charged it back up and have been able to turn it off by performing a hard reset while connected to a PC)
in the last few days, i've tried flashing an official stock ROM for jellybean, but that failed, and bricked the phone. i got back to having a working recovery by using Droid RAZR Utility 1.82, which set me on 'stock 6.16.211'. immediately following that, i get the red moto logo, followed by the standing android with the dodecahedron spinning inside him (update screen) the progress bar below him hits max, disappears, then the screen goes black. phone restarts, red moto logo, then black... i'm pretty sure the phone is still on, because i get the 'connect/disconnect' tone on my PC... from this point, i've got all the recovery options, but i'm back at square 1... any ideas?