About 5 weeks ago I noticed a pretty bad rattling/scratching noise from my case. At first I thougt my neighbour was drilling some holes in the wall but then I put my headphones down and nticed that it was coming from my PC. I have a Sharkoon TG5 with the stock fans. I couldn't disable the fan via bios or SpeedFan to check if it is the case fan or my CPU cooler (arctic freezer 34 esports duo). If you have any ideas on how to disable the case fan without plugging it out or if you had such a noise with the same CPU cooler pls answer. Any help appreciated:)