My Arduino UNO becomes not visible by USB after a short circuit (I guess)

My Arduino UNO becomes not visible by USB after a short circuit (I guess).

But the builtin LED ON is up when I plug in the uno by USB.

I detect that a component is heating strongly.
I think this component is a diode but I don't find its reference.
Please see component marked in red on attached screenshot.

If this component is down, could explain that my UNO does not run ?

Thanks.