Arduino Uno Rev 3 Troubleshooting

Can you please assist my arduino board has a flashing L LED and Green On but is not being read by the PC power the L LED is blinking continously indicating it is running a sketch but there is no com port when i connect it to the pc. Any assistance could help Arduino uno 3

You got this blinky thing and it flashes a LED. More information, how is it connected to your computer? What computer are you using? What OS? Which IDE? etc??? Post a clear picture of it connected. Be sure to list any hardware connected as well.

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