1 point
You really just need, like, a screwdriver set to get into most laptops. Maybe you can search online (e.g. on YouTube) for tutorials for your model. Then you can buy a replacement fan and also replace the thermal paste, because 13-year-old thermal paste surely isn’t doing you any favors in the performance department. Altogether it shouldn’t cost more than €50 (if you’re careful not to break any internals).
BTW, if you want to watch YouTube videos with less resources, you can also copy the video URL into VLC