Strange buzzing sound

[P924]

The 4/8 wires goes to a dc-dc converter that powers the CPU. If that causes the buzz, its probably the DC-DC converter on the MB that is faulty. = New MB.

 

[Rudimental]

Probably a vibrating choke. Try pressing on them with a pencil with a rubber on the end.

 

[blue-eye-boy]

Thats bad if I must replace the mb. Will try the pencil, maybe I get lucky. Thanks

 

[Rudimental]

It wasn't the clearest, but what you do is press on the choke when the PC is on, and that will let you know if it is the choke. Once you take the pencil off, it will probably start making a noise again, and you'll have to do something like use a glue gun and glue it to the mobo to stop the vibration.

 

[blue-eye-boy]

So I checked if it is a vibrating choke, without luck. The buzzing just went on.

But what I want to know, isn't there a way I can check if it is the cpu or the motherboard? I mean to replace both, if it is just the one. Is it possible?

 

[ponder]

But what I want to know, isn't there a way I can check if it is the cpu or the motherboard? I mean to replace both, if it is just the one. Is it possible?

Use your ears. You can remove the PSU out of the case and connect up the wires from outside of the case. Throw a blanket over the case and hear if it's the PSU, if not then listen closely to the MB.

You could also remove the PSU without connecting it to the MB and turn it on by shorting two connectors on the power socket that plugs into the MB but this way there is no load on the PSU so it might not yield the same result.

 

[blue-eye-boy]

No know its not the psu, the questeion is btween the CPU(not psu) and the MB. I did check, it cant be the psu.

 

[AstroTurf]

take a psu out of another pc and try it on the motherboard.

 

[blue-eye-boy]

And after a lot of frustration, guess what was the problem?

This little bugger!

 

[chrisc]

That is the speaker. It means that a capacitor powering the chip that produces system sounds is on its way out. Are any of them leaking? You can do without the speaker but you will not hear error beeps should something not operate, like memory, etc

 

[blue-eye-boy]

Didn't see any of them leaking. Will check just to make sure.