Wow...most of that way over my head....but great thoughts.Could the source of the buzzing (while on UPS) be caused by the lack of a completely smooth sinusoidal wave coming out of the inverter? I'm by no means an expert on this, but I was following a thread about this on a Mac audio site where they were looking for portable power ideas (location recording) and the experts there said that the power being output by the "usual" UPS units is not exactly clean and has a waveform that is less than ideal....good enough to run the gear but not as smooth as wall power or a better designed UPS source. Just an idea..... God help you if they are as noisy as the old blowhole power supplies.
Then how did you get rid of it?My Buzz was coming from the adapter part of the power cord, Plugging into my surge protector didn't accomplish anything
It was almost as if a power drain elsewhere in the house jarred the power (Or somehow in a very complex way changed the consistency of it) for my laptop. Could also be coincidence... I'm just glad I'm not buzzing anymore.
Oh yeah, under Windows XP the buzzing is worse!Mine buzzes too - annoyingly - and has since the machine was new. I assumed it was the power supply, ignored it. Then, after I installed Leopard, I found I could now control the power supply fan from the SMC fan control panel (coudln't under Tiger). When I bumped the PS fan speed, no more buzzing. Instead, I get the more white-noise-like sound from the fan, much lower volume. Interestingly, I note that when I boot into Windows XP, the buzzing is back - presumably since I can't control any of the fans.
Are these audible enough to be picked up by a camcorder....or a digital camera in video mode? That's what we did with a bad dishwasher that was making noise.I took my Mac in to the genius bar because of the PSU buzzing and the random pops in the sound cards line out, and the guy cannot reproduce it? What should I do? I want these fixed.
Boy, I am relieved that I am not the only one annoyed by the buzzing sound from the power supply.Hey gang,
Does anybody else's Mac Pro power supply emit a buzzing sound? It's really annoying in an other wise quiet system.
But you didn't even notice it before this thread started did??I took my Mac in to the genius bar because of the PSU buzzing and the random pops in the sound cards line out, and the guy cannot reproduce it? What should I do? I want these fixed.