I've experienced some strange noisy sound in my laptop. I can't definitely tell it's from the fan, but I think so because hdd failure sounds are different.
The laptop is Dell latitude e6410, its hard disk and its cooling fan is next to each other so I can't distinguish where the sound comes from.
Here is the sound: https://youtu.be/3ud-5u_jJnk, sometimes it runs continuously.
It's not overheating. I've checked the temperature and it's around 50 - 60 celsius. It's maximum degree is around 100, so it is not the cause of heat.
I also tried disassembling the fan but it has two plastic weldings which I can't open. I tried using blower and using a brush to clean out dust but the sound continues.
Is it definitely the fan? then should I replace it or can I try something else?
Thank you in advance!