Geschiedenis van "How to replace the fans?"

I have a Gigabyte Aorus 15P WB that needs fan replacements.  I don't know how to do this and I don't want to remove the heatsink unit.  I want to separate the fans from the heatsink unit and replace JUST THOSE.  How do I do this?  I already know how it opens so I can perform basic maintenance but I need to change those fans.

Toestel:

Aorus Laptop

Status:

open