I am experiencing odd "click" noises from my MBP, while sound is muted, it's unplugged from the power source (ie running only on battery), and Windows in Parallels shows a message dialog.
- Unplug the laptop (right now, 94% battery)
- Ensure the volume is muted
- In Windows on Parallels, do something that shows a message dialog
- A loud "click" will be heard. It sounds plasticky or staticky, like the pop you get when plugging in a speaker to a powered amp, and I can't trace it to either speaker - it seems to come more from the back center or back right (maybe the right-side speaker) of the laptop. Two seconds later, a second, slightly quieter click will occur while the message dialog is still open.
The laptop is muted, absolutely.
Is there another sound source in a MBP, apart from the speakers? Why would this happen when showing a dialog - could it be a mechanical change in the laptop itself, caused by something to do with the video card?
- Early 2011 model MBP
- Yosemite, fully up to date
- At the time, running Parallels 9 hosting Windows 7
- Volume does not have to be muted for this to happen, but it does happen when the laptop volume is muted, making me think it may not be a sound from the speaker (?)
Edit: The original question was that this happened for a low battery warning. Since it's now happening with a nearly full battery, and it seems to be related to message dialogs, the fact the messages were about a low battery is a coincidence.