My leonardo was working fine until today, when I plug it to my computer all led (RX/TX/L/ON) stays on (Green for on, amber for others) and my computer no longer see a com port. (by the way, do you know what the L led mean ?) If I add external power, TX goes off then after few seconds RX goes off too then back on. With external power, the atmega goes very hot (I can't touch it). RESET button do nothing.
Is my Leonardo dead ? Any idea what could have cause that ? The fact that the atmega is so hot when the board is powered up with 12V let me think that the voltage regulators is no longer working. Good guess ?