I have a strange problem with my Mega 2560. It used to work fine with my Win7 set-up for weeks of programing and testing. Then one day, I changed one code line in my sketch, and after that I was not able to upload it anymore. The Mega still shows up as a device on the computer. I re-installed the dr…

Arduino Mega Suddenly Not Programmable Anymore on Win7 But Still Works with Mac

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