Today, for the second time, my Arduino Pro Mini 328 was running a sketch, then suddenly froze. a reset did not help. The LED on pin 13 no longer lights up after a reset, indicating a lost bootloader!!
my questions: - how could this happen? I was running a simple sketch, controlling some LED drivers and reading analog inputs, nothing fancy. I was powering the whole thing using a regulated 5V supply. The only thing I can think of, is that the high power LEDs might have drained too much power from the supply at some point. But that would just have triggered a reset, i don't think the ARduino's memory should be damaged by something like that.
- how can i load up a new bootloader? I have a second Arduino using the AVR ISP emulator, and I hooked them up, but the Arduino IDE freezes when I select "Burn Bootloader". I've disabled the auto-reset using a resistor.
Has anyone ever experienced something similar? Looking forward to answers! Thanks a lot!