Over the last days, my laptop's fan is making a constant grinding noise all the time, as soon as it starts to spin, except maybe for the first minute or two after turning my laptop on. It's a constant, loud noise and can be heard in this video:
Initially, I had suspected it was a dust issue, so I disassembled my laptop to clean the fan and found it in the following state:
Nevertheless, the noise did not go away after that, as it's evident from the video.
I am very confident in replacing laptop hardware parts, but I have zero experience with fans. Is this grinding noise indicating my fan needs replacement? Would you recommend any hardware/software checks beforehand? (Debian Testing user, if that matters)
If my fan does need replacement, which is the correct process of doing so? For the RAM I would find a similar type and frequency, for example; what would I look for, in this case? Do I also have to disassemble the whole heat sinker that the fan is connected to? (see picture below)