Asked on Super User by David, 2 years ago. No reply there for at least a week.
MacBook speakers crackling and laptop turns off when unplugged even though the battery is full
I hope someone can help me with this issue. About a month ago my MacBook Pro Mid 2012 speakers started to rattle badly, specially with bass sounds, and today the laptop started to turn off instantly when unplugged (as if it didn't have a battery). The battery shows 100% charged though. I run the Apple hardware test and says everything is ok. I have also reset the NVRAM and the SMC, but nothing has changed. My MacBook charger insulation broke a few months ago and I have been using it with some tape around, don't know if it may have caused any of the issues. Does anyone know what it could be? I
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MacBook speakers crackling and laptop turns off when unplugged even though the battery is full
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