The photon is not running the program it has been for months and now has a solid blue led next to pin 7. Cannot flash programs to it it either. The flash process fails saying it is not on line. Tried it connected directly to the PC with USB connection, also fails. The Tinker program says it is flashing properly, but no leds blink and there is no sign if life. I found a reference that says it is a corrupt bootloader. Is this fixable by me?