When I shut my computer off it makes like a screech that was quick and semi-loud so I turned my computer on again waited a bit everything was running fine so I shut it off again and it made that screech again. Earlier today I opened my computer and and dusted it. I have an Alienware aurora r11 so I had to pull the psu arm out and I didn’t bend anything so I have no idea what this could be. It is not effecting the performance or anything. Can somone please help ?