Currently Being ModeratedJul 30, 2013 5:55 AM (in response to neil74)
One other thing.... One thing that I did see mentioned somewhere is that changing the wireless channel from auto may solve the problem, cannot find that again though so am unsure whether that would work or not.
Currently Being ModeratedJul 30, 2013 6:38 AM (in response to neil74)
An Extreme should be completely silent but a buzzing or sizzling noise can emanate from components in its power supply. It may change depending on the Extreme's power demands; a function of your wireless environment.
If it were new I'd want to exchange it for another because the noise can be annoying, but if it's out of warranty I wouldn't be concerned. It does not necessarily indicate an impending failure.MacBooks iMacs iPads AirPorts, OS X Mountain Lion, 28 years Apple!
Currently Being ModeratedJul 30, 2013 10:34 AM (in response to John Galt)
Thanks, it is definitely from the router itself rather than the power supply block. It is not really loud and I have to get pretty close to hear it but as I say I am used to routers being totally silent. Looking at google then I do not think I am alone in experiencing this.
Currently Being ModeratedJul 30, 2013 11:43 AM (in response to neil74)
I understand, but I understand the Extreme requires voltages in addition to the external power supply's. Apparently the DC to DC converters can be noisy, and this will vary under varying loads.
Currently Being ModeratedJul 30, 2013 2:45 PM (in response to neil74)
If you have applecare on any computers it should still cover a Gen5 AE.. get it replaced if possible.. As John says it can be a component that has just hits its harmonic with the chopper supply freq and is making audible noise but it can also be a sign of component about to fail.