Arduino Nano CH340G issues

Hardware
1

I have this alt arduino nano, and I tried to know what could be the issue with it but still can find what's the actual problem.
Here are some of the caracteristics of the problem I'm dealing with:

  1. When I power up the arduino nano, the POM led light's up, and the TX led starts blinking.
  2. When I plug in a pc the arduino doesn't even get recognized by any device. What I mean with this is that it doesn't even make changes in the device manager (In windows 11). In MacOs doesn't make any sound or notification.
  3. I messured the voltage difference between ground and the 5V pin, and it shows 4,7V, I know there's a drop when it's about this stuff but don't know if this drop is normal. Also measured 3,3V and showed up 3,28 so it seems fine.
    4.When I press the reset button on the board, the L led blinks 3 times.

One point to consider is that I also have an Arduino Uno and an Arduino Mega, and both work fine, so it's clearly an issue with the arduino nano.
Now it might be a driver issue too, but again I don't know where, which and how I'm doing things wrong so i don't have set up the right drivers.

Now I could just simply buy a new board, but the fact that it doesn't work is just a little frustrating.

Do you guys have any idea of what could it be wrong?

2

Have you tried different Tools/Processor settings

3

Try different cables. You might be using a charge-only cable instead of a data/sync cable.

If this is a new board the TX LED should not be flashing continuously. If it's not a new board, the TX can be flashing because the loaded program is sending data.

So I suspect that the CH340 is misbehaving. On posdible test can be to use your Uno as a TTL-to-USB adapter

Connect TX of Uno to TX of Nano, RX of Uno to RX of Nano, GND to GND. Keep the Uno in reset with wire between reset and GND. If you want to play it safe, put 1k resistors in the TX line and RX line.

Hook both up to a PC, select the Uno port in the IDE and see if you get data in serial monitor.

If you get data, the currently loaded program on the Nano is providing it.