It started as a loud rattle. Then a few days after that started, the rattle was replaced by stark silence. Then, just minutes later, the laptop loudly and continually beeped to indicate its dissatisfaction. It was overheating because the fan had failed.

I cleaned it out with an air duster, and for a few days the fan came back to life, but alas it was not to last. On Sunday, while my laptop exported the last of the edited astronomy videos, it switched itself off.
I decided a fan would be considerably more affordable than a whole new computer, so I went searching online for a replacement. How frustrating it is that every manufacturer has a slightly different fan design, and even within this laptop the CPU and GPU fans are slightly different sizes.

I’ve ordered a replacement CPU fan – the part that has failed. Hopefully when it arrives it will fit, because I am not sure I trust the seller.
