PC Turn OFF, PSU Mosquito noise

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J

Jeordanis Figuereo

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Sep 29, 2013
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Hello Guys,

I come here again for some help. From my research looks like my problem is the PSU, but I need your opinion before buying a replacement.

Today I turned ON my PC and heard a "pop" noise and then a permanent "Mosquito" noise, but the PC boots normal, after a few minutes of use (Browsing internet) the PC restarted and after opening the session the fans of the graphic card started spinning at full speed and the display turned OFF.
Right now the PC is working but I fear my PSU can damage my whole system any time now.

Specs:
CPU I7 4770k
Motherboard: Gigabyte Z97X-UD5H
PSU: Corsair HX650W
Graphic Card: MSI GTX 1070
RAM: Kingston Hyperx Fury

Thank you.
 
Solution
Aeacus
The curve in your MoBo isn't enough to make it inoperable. Also, when your MoBo is in your case and well screwed down, it should straighten. MoBo curvature is fairly common and even some brand new MoBos can come with a curve.

For me, those spots behind MoBo do look like heat damage. Still try to RMA the MoBo and at worst Gigabyte checks your MoBo, identifies why it doesn't work and sends it back to you as is. At best, they send you a new MoBo.

Though, you can try to use 2nd PSU to see if you get life back at your MoBo before your RMA it.

If there would be something wrong with the wiring in the apartment, your PSU would be 1st one to go, not your MoBo.
Was the 1st dead MoBo also from Gigabyte? If so, maybe it's good time to change the...
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Hi Aeacus,

Thank you for your answer. Now I'm not sure if the problem is the PSU. Right now the PC won't turn on at all, I take everything out of the case, only the PSU, CPU and CPU fans are connected to the motherboard, I don't get any Beep codes from the motherboard, even if I take out the RAM, the error code screen of the motherboard is not turning on.

The motherboard have two bios with two LEDs indicating what bios is using, when I try to turn on the computer the motherboard keep switching between BIOS A and BIOS B.

In the bottom of the Motherboard I find something that I think it wasn't there before. Please look at the image included.
And the mosquito noise of the PSU is not present anymore. I hope this extra info is useful.

5neVqcIWd.jpg

http://pasteboard.co/5neVqcIWd.jpg

Thanks.
 
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Can't say for sure but the markings behind the MoBo are looking like burn marks.

Your description indicates a dead MoBo. If the PSU would be dead, you wouldn't see any signs of life at all.
Here i suggest RMA the MoBo and get a replacement from Gigabyte. But if you don't trust Gigabyte anymore, go for Asus or MSI instead. (I prefer MSI, both of my builds, Skylake and Haswell are using MSI MoBos.)

As far as "mosquito" noise goes and if it really comes from PSU then it can be either coil whine or fan bearing.
 
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Thanks again, Aeacus

I'm gonna try to request an RMA from Gigabyte, I want to try with another PSU first. What I'm afraid is maybe Gigabyte will refuse to RMA the mobo, the modo have a A slight curvature due to the weight of the CPU cooler and the Graphic card (I guess) and maybe that is considered as physical damage.

This is the second time that I lost a motherboard, could it be something wrong with the electrical wiring of my apartment? What else you think could be the couse of this?
I'm using a surge protector btw.
 
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The curve in your MoBo isn't enough to make it inoperable. Also, when your MoBo is in your case and well screwed down, it should straighten. MoBo curvature is fairly common and even some brand new MoBos can come with a curve.

For me, those spots behind MoBo do look like heat damage. Still try to RMA the MoBo and at worst Gigabyte checks your MoBo, identifies why it doesn't work and sends it back to you as is. At best, they send you a new MoBo.

Though, you can try to use 2nd PSU to see if you get life back at your MoBo before your RMA it.

If there would be something wrong with the wiring in the apartment, your PSU would be 1st one to go, not your MoBo.
Was the 1st dead MoBo also from Gigabyte? If so, maybe it's good time to change the MoBo manufacturer?
 
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Solution
Heat damage can occur due to the insufficient cooling and trapped hot air. Dust inside the case is also a great heat trapper.

Though, there are many other possibilities as well.

One example is a short circuiting. It can happen when any of the MoBo parts (e.g soldering ends) touch the metal of the case. Only the support pins on which MoBo sits are allowed to become on contact with the case. Area around the fastening holes on the MoBo is grounded and separated from the rest of the MoBo systems.

Static discharge from you can also fry the MoBo. Before i touch my PC internals, i ground myself by 1st touching the metal central heating radiator at my home and 2nd step is to touch the metal side of my PC case.

Low quality components used on MoBo can also be a cause to heat damage and/or MoBo failure.

How it exactly happened, i don't know. I can only speculate about it.
 
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Umm... I see. Something that I forgot to mention is that sometimes when I touch the metal parts inside of the case it feels a slight "electric current" that I can even feels in the metal parts of my headphones. Then i dismantled the PC and disconnected all the cables that go from the case to the mobo and only leave the power cable, after that the electric current disappeared.
But I was not able to find what was causing the problem, so I guess the problem if the case.
That was like 3 weeks ago, tow days ago this happened.
 
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