Hello there, recently I have heard a loud humming type noise from my computer which I bought from cyberpower over a little year now. This humming noise stays and goes. At time I hear it from 5mins+ then it goes away for a while and then comes back. It sounds like it's coming from the back fan of the computer but I am not entirely sure as it could be coming from somewhere else.
Can I open the case while the computer is running to see what the problem is and where it exactly is coming from? If I can do this without harm, should I turn the computer off, remove the side lid and then turn the computer on or can I just take it off?
Also, if it is the fan, what could be causing the fan to make the noise?