Windows 10: Laptop screeches REALLY loud when I open it.

I need help quickly. I just set up a screen recording software on my windows 10 laptop and I went into a menu to choose my audio input. I switched from my mic to my speaker and it started screeching extremely loudly. I closed my laptop immediately because it was that loud. And now whenever I open my laptop, even a slight bit, it continues the noise. Is there any way I can stop it without opening my laptop to its screeching?

:)

 

Extremely Loud Screeching coming from the PSU


Apart from my Thread_Stuck_In_Device_Driver BSODs and completely broken Windows Apps, I have recently stumbled across a new, very unnerving problem, that has so far only occured twice. I was playing Counter Strike: Global Offensive for about 3 hours, before my computer started making a rumbling-buzzing noise. I have looked at my computer and while I was looking at it, the rumbling turned into a really loud high-pitched screech, so loud you could hear it downstairs. This literally scared the living dumplings out of me, and I rushed to unplug the power cable. Now, if I didn't reconnect to the Counter Strike match within 3 minutes I would be banned for the next 7 days, so I decided to power up the machine. The screech continued, so I unplugged the machine, and without taking much notice - opened by case (to pinpoint the sound). However due to the rush I have broken a ribbon on the side, meaning I have voided my guarantee (as stated on it, as I found out after).
I ran the computer once more, and I could identify the location of the problem - the PSU was responsible for the screech (I intially thought it'd be the CPU fan). I left the computer open for a while, then after an hour I put it back together and the sound is nowhere to be seen. However the computer continues to hum (not a normal humming), so I placed a 500g object on top of where the PSU lay and the humming is gone. (Now I am also banned for 7 days in Counter Strike)
The computer (and therefore PSU) is less than a month old, and due to the breakage of the ribbon I have lost the warranty.
I will attach the DM Log here as it contains some information about my machine and my configuration.

 

speaker is screeching

my laptop sound mixer is causing a screeching sound

 

X800GT Screeching Noise

Wheneever i enter a game such as Warcraft, or enter the 3d view of ATI Tool, my case emits a relatively loud screeching noise, which i presume is coming from my graphics card. Can you please tell me how to fix it...