the story goes like that: I powered a 128x64 OLED Display by the Photon’s 3v3 pin, together with a I2C temperature sensor. Everything was powered with a (now presumably) faulty wall power supply that should have given the board 5V over the VIN pin.
The system worked for about 20 minutes, that’s when I noticed that the display doesn’t show anything new and the LED wasn’t breathing blue anymore, just a static blue at this time (like frozen). I immediately disconnected it from power and noticed that the whole board was extremly hot.
I repowered it with another power supply connected to the micro USB. The device starts with SOS+1, when I try starting it in safe mode it just restarts to SOS+1. However, DFU mode works.
I then conncted it to my laptop doing “particle update”/“particle flash --usb tinker” which tells me that both operations where “successful”, but the photon still restarts only in SOS+1. I then notice, that my device still gets extremy hot: Measured between 3V3 and GND there seems to be a short, but there is no short between VIN and GND (the pins I first used to power the device) and the both outer micro USB pads (what should be +5V and GND).
Is there anything I can do or did I fry it for good?
Thanks for your help