By mistake I connected it to a 12V AC power source instead of 12V DC and blew it, I saw the spark and smoke coming out of C11.
I’m not sure that that’s the only thing that got burnt but that’s a good place to start (when powered form the USB, the board still works fine).
I did try to see the value of C11 form the schematics but I don’t understand it, it says: 100n_NM
So does anybody know the type and value of capacitor C11 on the Seeeduino Mega boards?.
Thanks