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  • That appears to be based on a 32u4, so if it isn't physically damaged you may be able to recover it using DFU mode - at least it's worth doing some research on the subject. Commented Sep 24, 2014 at 15:01
  • This certainly seems plausible, but it looks liek getting into DFU mode requires resetting the board via the ICSP headers. I have tried that, and just like when I reset with the pushbutton or by connecting the RS pin to ground, the board doesn't respond in any way. Or do you think I'll regain the ability to reset later on in the process? Commented Sep 24, 2014 at 20:41
  • You can use another arduino as ICSP programmer. Commented Sep 24, 2014 at 21:00