I just bought a few Photons to add to my collection. One of them is SOS #1 (Hard Fault) straight out of the box. I’ve tried to force a DFU firmware update to 5.2.0 + re-flash of tinker (The two firmware flashes and tinker report successful in the command line) but upon boot it flashes white for maybe 1/10th of a second, then immediately returns to SOS Hard Fault.
Seems like maybe a factory faulty Photon? Is there anything else I can do to troubleshoot or fix it? I’ve tried using a 5v bench power supply to rule out power issues, and I was able to use DFU successfully to upgrade another Photon just to validate my procedures were correct.