Note that parts like this are more easily replaced using a hot air station than a soldering iron.
Looks like the audio amp fed by the MOSFET is a Realtek ALC1304, which I can't find any data on, but searching for the pin names finds that it could be a clone/compatible to the TI TPA3131D2/TPA3132D2. This part has a power limiter, but if the Realtek one is configured the same way, then as implemented in the laptop, it has no power limit.
It is very likely that the reason the transistor failed was because of poor cooling, as it is a low cost, high-resistance transistor that is running near its design limits.
The MOSFET that blew up is rated for 2A continuous, and it's in the ~19-20V VIN circuit, so it begs the question of just how loud he was playing his music when it happened!
That said, not the first time laptops have come with sub-par audio circuitry:
https://news.ycombinator.com/item?id=7205759
https://marcin.juszkiewicz.com.pl/2012/12/10/how-to-fry-spea...
https://apple.stackexchange.com/questions/100530/can-volume-...
Looks like the audio amp fed by the MOSFET is a Realtek ALC1304, which I can't find any data on, but searching for the pin names finds that it could be a clone/compatible to the TI TPA3131D2/TPA3132D2. This part has a power limiter, but if the Realtek one is configured the same way, then as implemented in the laptop, it has no power limit.
It is very likely that the reason the transistor failed was because of poor cooling, as it is a low cost, high-resistance transistor that is running near its design limits.
The MOSFET that blew up is rated for 2A continuous, and it's in the ~19-20V VIN circuit, so it begs the question of just how loud he was playing his music when it happened!
That said, not the first time laptops have come with sub-par audio circuitry:
https://news.ycombinator.com/item?id=7205759
https://marcin.juszkiewicz.com.pl/2012/12/10/how-to-fry-spea...
https://apple.stackexchange.com/questions/100530/can-volume-...