Tx3 mini what is this button on PCB for?

[FriskyDingo]

This is on the bottom of my tx3, theres no way to access it from outside the case.It has the normal reset button inside the av port.

[Guest]

This is on the bottom of my tx3, theres no way to access it from outside the case.It has the normal reset button inside the av port.

That's actual reset button, it should be accessible through pinhole at bottom of the case and not in AV port.