I don’t know about the 15v3, but for the 15v2 it was quite easy to get the fan out. Then identifying the model, I got a replacement, but had to prolong the wires, because they were too short. And then I remember that there was something strange with the color coding of the wires.
Some things are documented in this post:
But I think you already read it.
In principle, it should be not too difficult to replace the fan (try to see if you can take it out), then find a replacement on Amazon with long enough connector wires, it should be plug and play…