do i have to keep the pins connected after the procedure?
I bought one recently and i have the same issue so i think to try this out.
So far i change the port number, press reset button and make sure that the correct board is selected nothing works. the L LED is blinking green, and the TX/RX blink red when trying to upload but then it shows the error.
can i try a something else before using soldering to verify that this is the case?
I know is an old post but i have this issue now.
Thank for the trouble.
Cesar