Arduino won't upload

Development Tools IDE 1.x

Topic		Replies	Views	Activity
Uno works fine but can't upload anything to it anymore IDE 1.x	25	9983	May 5, 2021
UNO Trouble uploading on XP ... not in sync/ protocol error IDE 1.x	55	19196	May 5, 2021
Brand new Uno - can't upload anything to it IDE 1.x	30	12129	May 5, 2021
Aruino UNO Rev3 Bricked ? (ATMEGA16U2) General Guidance	18	12472	May 5, 2021
2nd Arduino, Different Problem, Still Useless. IDE 1.x	21	9723	May 5, 2021