Question Loud odd noise from notebook VN7-791G

[djneji]

Good Evening all,
I have this incredibly strange and loud noise in my laptop while gaming or
watching a movie for example (after some time).
The first time I heard it i told to myself:"Time to clean it up!", so
I disassembled it, cleaned every fans and changed thermal
paste just in case. After that I turned the laptop On and the noise was still there.
To be precise the noise starts quietly only when the pc has been on for some time (10 minutes)
and while the user is doing something on it, like I mentioned earlier, gaming or watching a movie for instance,
and then it majesticly becomes louder and louder.
After that I thought the problem could have been the speakers so I unplugged them, but with no results.
I then tried to put the fans at maximum speed and they work like a charm, no problem whatsoever, no noise.
In the end my guess is that there is something terribly wrong in the motherboard of the pc, as hypothesized
also by a shop where i brought my pc (but they didn't have any clue where exactly the problem was on the MB).
You are my last hope in order to save this computer. Unfortunately the entire MB replacement cost like 400€, which
honestly it isn't worth, so I'm looking for single components replacement (like capacitors replacements or something similar
if that's the problem)

Here's the video Noise_VN7_791G

P.S. The ones recorded are the speaker holes, there are no fans there.

 

[velocityg4]

Buy a stethoscope. Then remove the back cover and locate the noise. They are remarkably good at helping you pinpoint a noise source since they are so sensitive.

To me it sounds like a fan. But you already said it isn't. Perhaps when you turn on the fans at full speed manually. It is only cranking up the CPU fan, not the GPU fan.

 

[djneji]

I own a sthetoscope actually, this could be a great idea I will also recheck the gpu. Thanks for the tips