High-pitched noise from Logitech Performance MX

Solution 1:

There are others who have reported the problem to Logitech. You should checkout their support site. I'm only answering your last question because the others are ambiguous.

According to the Logitech Community forum, you can try this "short power drain procedure" to see if it resolves the issue. If not, contact support.

1. Remove the battery off the mouse.
2. Press and hold the left and right click buttons for 15 seconds.
3. Release the buttons and place the battery back properly. If possible, replace the old ones with a new single AA NiMH rechargeable battery.
4. Check if the mouse will feature the same coil noise.

Source

Solution 2:

For anyone who happens to come across this post, I just worked out that I was having this problem because I was using an old rechargeable battery. Replacing it with a newer one didn't completely resolve the issue, but it made the noise much higher frequency, which I now don't notice unless I hold the mouse to my ear.

Solution 3:

I found a way to get rid of that irritating hiss. Now I'm 100% happy with the product.

The way I fixed it was by loosening a bit the screws at the bottom of the mouse. The screws are positioned below the sticky plastic pads so you have to remove them. After that, there are two screws on the top pad, one on the bottom and one on the side as well. If by loosening the screws a bit you don't see an improvement try carefully to take apart the whole bottom panel and put it again back with the screws a bit loosened. I have to warn you that the build quality of the pads is terrible and if you are not careful when removing your pads might not look as good as new when you reposition them but this won't hurt the aesthetics of the mouse.

I guess the source of the problem was that a component was making contact with the bottom side of the mouse which amplified its frequency.