15" Apple Studio Display

I have a 15" Studio Display connected to a powermac g5 w/ nvidia fx5200; everytime i decrese the brightness level of the display i hear a odd electric buzz/hum from within the display itself, it goes away if i keep on the highest/max Brightness level is there anyway to fix that or is this a dying/defective display?
thanks!

There is no way to fix that but neither does it indicate the display is dying. It could go on like that for years. It's just a coil or transformer that is acting a little bit like a speaker coil and moving slightly in response to the chopped waveform of the dimming circuit. The slight movement is disturbing the air around it an sending off sound, just like a speaker diaphram. Definitely annoying. iTunes might be the only cure

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