Question Yet another boot/brick issue

Have an XT926 Maxx with an unlocked bootloader. I can wipe partitions and flash custom ROMs just fine. I can also fastboot back to stock images. But for some reason, I can't get past the boot animation. For example, on the stock rom, it'll display the 'DROID' image upon boot and play the 'DROID' sound but then suddenly freezes, then reboots (over and over again). I've gone into factory recovery and wiped data/cache and still have the same issue.

I've searched the forums and was not able to find anyone with the same issue.

Any suggestions? Am I screwed? Perfectly good phone otherwise!
nexus 5 | moto x | razr hd maxx