Arduino Uno power light is on but can't upload sketches

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Re: Arduino Uno power light is on but can't upload sketches

Post by adafruit_support_bill »

If it doesn't respond to the reset or re-programming, it is possible that the 8U2 is damaged somehow. But it sounds like it is still able to identify itself to your system profiler.

What do you see on the LEDs when you first plug the UNO in?

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