Fan Shim Button to turn Pi on and off FYI post

[cmonty14]

@sandman-gamma

I’m glad to learn I’m not the only one being “annoyed” by the fact the fan keeps spinning after shutdown. What I did: if we check the shim board we see that the RPI physical pin 12 (aka BCM GPIO 18) that controls the fan is pulled up on the shim board via a (about) 8.2k resistor to the RPI pin 1 (3.3V).
It’s enough to simply sever that copper trace between that resistor and the 3.3V pin. If someone really wants to go by the book with this one (which I did), with a hobby knife remove some of the lacquer to expose a small patch of GND copper next to that 8.2k resistor pad that was just severed from 3.3V line and solder it to the newly exposed GND patch. But again, this is not really necessary as the gate current of the mosfet transistor that drives the fan is enough to drain the pin 12 (GPIO 18) to ground in just 5-6s seconds after RPI shutdown (width the ground connection described above the fan shuts off right away on shutdown).

Can you please share more information about the modification needed on the Fan Shim board?
I know you provided a picture, but unfortunately it is not clear when zooming in.