I was wondering if my Arduino could be saved. I fried it recently shorting the board somehow (not sure how exactly) when I was connecting 12V to the Vin pin. result: I saw smoke coming from the M7 diode.
However, when I connect it, the power led, and the orange (pin13?) led are still turning on when I connect the arduino to my computer with the USB-connector. When using the 12V power supply (barrel connector 12V or battery 9V) nothing seems to happen.
Also when I measure the 3.3V pin with my multimeter, while connected to my computer, it reads 5V.
When connected to my computer the computer does not see anything on the USB port.
I also just bought a new arduino and an esp-WROOM-32 and the esp works fine on the same USB-port, but the arduino (chinese cheap stuff I'm affraid) does not seem to have a bootloader installed (but that is not the problem here). So USB port and IDE-software work fine.
So my guess would be that the voltage-regulator and the M7 would be fried. Would you guess I could save my board when replacing those two components?