Will not power up, a MOSFET get's instantly hot, possible to replace?

Thank you so much oldturkey! I'm genuinely impressed with your answer. Thanks for the info and the link. I'll order a few of those MOSFETs, and then practice soldering them on an older fried MBP board I have laying around, before attempting to fix this (still nice) MacBookPro.

(It seems like the specs 30A 30V would refer to 900 watts total!? Doesn't seem likely those are actual simultaneous limits. I suppose it's 30 Amps OR 30 Volts limits?)

Thanks again,

Tom

I've ordered 10 of those MOSFET N-CH 30V 30A LFPAK (RJK0305DPB-00#J0CT-ND). Is it possible that some other bad boards I have, have this exact same problem (though I haven't seen burnt marks there either)? How common is this PBus Supply failure?

Thanks again,

Tom

First off, thank you for accepting my answer. Over the last few weeks I noticed an increase in that particular FET showing up as issues. Since it is part of the main power supply and battery charge circuitry, I suppose it also take a lot of power surges etc. You can most certainly check your other boards, lets face the components are not to expensive and it is a great learning experience. As you noticed on the datasheet, max power is 45W so the drain voltage is max to receive by the FET and 30A would be quite a jot on the rest of the circuitry...;-)