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LarrySunshine

macrumors newbie
Original poster
Aug 17, 2021
20
2
So there is this silent squeeking sound from the Mac when it's sleeping. It's defnitely not the fan. I can only hear it when I put my ear to it, it's very silent, but I don't like it. I googled it, and I see other people getting this even after the replacement. The interesting part is when Mac is on, there is NO sound like that, I can only hear the fan, but no squeeking. Also, I can hear a very silent electric prrrr sound when it is off, but plugged in. These things common and normal?
 
Could be coil whine or capacitor sqeaking, but I have no direct solution. Could occur in the built-in power supply when there is room or air pockets inside the used coils, so when they resonate (50 or 60 Hz) you hear a noise.
 
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Could be coil whine or capacitor sqeaking, but I have no direct solution. Could occur in the built-in power supply when there is room or air pockets inside the used coils, so when they resonate (50 or 60 Hz) you hear a noise.
So it's nothing to worry about?
 
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