I have a Pro Micro board at which tried to upload a sketch with sparkfun's Pro Micro 3.3v processor selected.
After the upload completed successfully the board did not run again and is not even detected from the arduino ide anymore.
When I uploaded sketches with the leonardo 5.5v board selected everything went well and I had no problem. Now I can not burn the bootloader because of the arduino ide not detecting the board.
What can i do?