Particle Photon led stuck on solid white, factory reset procedure not working

[spongefile]

I got mine fixed just now by following @kennethlimcp 's suggestion:

Continuing the discussion from Mystery Photon LED colors and patterns:

@kennethlimcp

I guess you were using particle setup?

So after that, it went from flashing white to flashing cyan?

Breathing magenta means it connected to the but no user firmware running.

You can attempt to flash an empty app and it should trigger a system update --> blinking magenta