Hello, I noticed that some times, there's some very silent white noise coming out of the speakers of my Cinema Display (27"). This is usually when I hit the volume keys on the keyboard, then it starts. After a while it stops again. Or actually I think it happens anytime a sound is played form the Mac. It doesn't happen when the Mac Pro's integrated speakers are selected as the output. Only when the Cinema Display is. I don't know if this is a Cinema Display issue or a Mac Pro issue. The Mac Pro is a 5,1. It was in repair not long ago and this issue started when it came back. I think the processor boards and the logic board. Apparently the PCIe slots were damaged. I don't hear the noise in headphones. What I do hear in headphones however, are weird blips and artefacts. (even when there's no sound playing) I hear these artefacts on other headphones too (but I don't hear the artefacts on all these headphones when plugged into other devices, so it isn't the headphones) but weirdly enough, I do not hear the blips and artefacts through the Cinema Display speakers. Thanks for any tips or help!