The power button broke on my QC35. After repairing it they make an extremely annoying hissing sound only when connected to my macbook air. Doesn't happen on my iphone, doesn't happen on any other device. Tried updating the firmaware, doesn't seem to make a difference. They guys at the shop said they never touched any of the wiring internally they just removed the plastic cover and replaced the broken power button. Anyone experience anything like this?
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