MOSFET failure (Ultra Series 165H)

[MJ1]

@rcm

Look like a failed AON7566 MOSFET.

All of the MOSFETs there are marked AON7566?

@Second_Coming

Thought this MOSFET failure was only a 11th gen thing…but I guess any component could go wrong, regardless of mainboard generation. Hope we won’t see more of this.

This MOSFET is from a whole different manufacturer. Looks like AON7566 would be from Alpha and Omega Semiconductor. The previous ones were EMZB08P03 MOSFETs from Excelliance MOS [IN TICKET] Piece of mainboard partially melted - #90 by MJ1

And this is only one case of this issue in a newer mainboard. The MOSFET itself may not even be the issue, if a failure or glitch happens elsewhere which causes improper control of the MOSFETs, they can then overheat.