SparkFun Weathershield killed my Photon

[ScruffR]

That seems to be very much a similar case as this one

Photon (not really) fatal hardware issue - only System.sleep [Solved]

Hi All, I seem to have a hardware problem with the Photon. When connecting (or using the reset button), As usually its goes from white to green into the breathing cyan mode. After about a second or two all light go of and the Photon is dead. When applying factory reset the Photon doesn’t move out of blinking yellow. Would anyone know what I can do to fix it? Many thanks, j

I do like the reaction of the OP there