I cann't uploade Blink

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Please try this experiment and then report the results:

:red_exclamation_mark: This procedure is not intended to solve the problem. The purpose is to gather more information.

  1. Connect the Arduino board to your computer with a USB cable.
  2. Press and release the button on the Arduino board that is marked "RESET".

Now please reply here on this forum topic with the answer to the following question:

  • Did you see the "L" LED blink multiple times quickly immediately after you released the "RESET" button?