I accidentally removed power during a firmware upgrade after letting my photon sit for a year in the closet. Now it is flashing yellow which is DFU mode, but neither command line nor the installer seem to recognize that it is connected to USB. Also when I try holding the buttons that are supposed to put it into different modes it only shows magenta very briefly then goes into flashing yellow and doesn’t stop. When you release the mode button when magenta is shown, you get one quick red flash before it goes back to flashing yellow continuously.
Looking for any help in recover this.