Bought recently a brandnew motherboard for my e6750 I bought the Asrock 4core1600P35-wifi+, And now it's making a weird noise from the motherboard(I got right in with my ear and determined it's coming from just behind the usb jacks that are on the back of the board).

It only happens when I move my cursor around on the screen, I've tried other mice and tried only putting it on the system and still makes the noise. Any ideas?

bump

Is your mouse wired or wireless?

If it was wired then maybe you're accidentally tugging a connection and causing some friction. However, that still shouldn't happen...

Are you using a Logitech mouse? Or a gaming mouse of some description?

I noticed this same noise on my Asus P5K (which is also P35) but it was reduced by setting the report rate of my mouse down with Logitech software.

I have a G7, and a G5 mouse. They both cause the problem, I just turned the report rate down to 125 and there's still a slight noise...!.. IS there a way to keep the report rate up but no noise?

I haven't found a way yet. Reducing the report rate on my G9 definitely reduced the noise but didn't eliminate it. If I find a more long term solution I'll let you know in this thread. Likewise if you find something, I'd very much appreciate knowing what you did.

Alright cool thanks, and I'm thinking I might post something on the logitech forums, might get a bite we'll see

It'll be a vibrating component, like a capacitor or something. Use a plastic ruler or something and touch each component in turn -- the noise should change when you find the right one. You should then use a gluegun or something and fix the component to the motherboard to stop it vibrating.

If _Raven_ has the same issue I believe he has, it's more of a whine/squeal than a vibration. Wouldn't attempt sticking a gluegun in a brand new board anyway, simply because of the warranty.

Yah it's more of a wine/squeal not a vibration. It's sad that this has to happen on a brand new board.

It's still caused by vibration. Phenomenon called "coil-whine". RTM the board.

just exchange the motherboard and I'm still getting the same problem I put in a Labtec mouse just a pretty simple one and there isn't anymore noise

Yeah, the vibration happens a million times per second or something, hence the nature of the noise

It could be a low quality or faulty capacitor.

Asrock = Budget Part.

I have the same problem with the same motherboard.
The noise increases when I scroll windows or when I copy files under windows xp.

Have you solved the problem?


Thank you!

its EM interference, and happens in different measure (noticeable and not) on most boards.

I had a Customer with an old ECS K7S5A board that emitted this exact type of sympton in that location. For me it ended up been his el generic power supply causing the issue.

I now have this board as well and I can confirm that it is coming from one or two capacitors under the heatsink. I actually think it is coming from the right upper small black square box looking thing that is half way under the heatsink. However there is one that sits to the left of it and two solid capacitors below them.

I was only able to take a stethoscope to the two square like capacitors or inductors or voltage regulators (whichever of the three those might be).

I will be applying some Conformal Coating to them to see if that helps.