I can't upload any sketch and "l led" is always on

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Hello everyone
when i try to connect my Nano v3.0( Nano V3.0 with ATMEGA328 and CH340 – AZ-Delivery https://www.evapoteur.com) to my pc , the l led is always on and i cant upload a sketch.
every time i try to upload a sketch i get this error:
avrdude: stk500_getsync() attempt 10 of 10: not in sync: resp=0x08
but the 0x08 at the end is always different.
i tried the loopback test but i got nothing echoed back.
the right port is selected.
im using Windows 10 and my IDE version is 1.8.13

Any assistance will be appreciated.

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Please do this:

  • (In the Arduino IDE) File > Preferences
  • Uncheck the checkbox next to "Show verbose output during: compilation"
  • Check the checkbox next to "Show verbose output during: upload
  • Click "OK"
  • Sketch > Upload
  • After the upload fails, you'll see a button on the right side of the orange bar "Copy error messages" (or the icon that looks like two pieces of paper at the top right corner of the black console window in the Arduino Web Editor). Click that button.
  • In a forum reply here, click on the reply field.
  • Click the </> button on the forum toolbar. This will add the forum's code tags markup to your reply.
  • Press "Ctrl + V". This will paste the upload output between the code tags.
  • Move the cursor outside of the code tags before you add any additional text to your reply.
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