PC makes a weird sound when I turn it off

[Joestick]

I recently built my first PC, all works fine except it makes a weird screeching noise. I don't know what this is and I am worried. My fans are working as that SAS s uggestion from a friend. I can supply a YouTube link of the sound!

My build : http://uk.pcpartpicker.com/p/YP6tBm

Yt link: https://youtu.be/AHs9LubAAoo

 

[NetworkExpert]

Have you checked your CPU fan? sometimes they can come undone if not locked in to place, or thermal paste isnt there.

check your PSU, since I know the corsair CX line up, tends to have issues.

 

[HiggsPrime]

Hello Joestick,

your system is fine. it sounds like as if someone fires a lazer from the inside 😀 . Some of the wires may be tangled try to move it away from all the fans.

Hope this helps your sound issue

 

[NetworkExpert]

I would also regularly clean out the inside of the PC to free it out of dust, at least once a week

 

[Techy Nicky]

Check to see if a wire is touching a fan. It happened to be, after i turn on my pc i would hear a weird noise until i realised a wire was touching one of the fans.
If that's not the problem, keep your ears near your tower to spot where it is coming from. Could also be a bad fan.