I have a fairly loud buzzing sound coming through my external audio when my MBP (mid 2010) is charging. I've tried switching speakers and headphones, outlets, between the two and three pronged chargers, and between individual chargers themselves. Nothing I'vetried has fixed it. The only thing that helps is my own physical contact with my MBP.
Anyone have any ideas?
MacBook Pro, Mac OS X (10.6.8)
It sounds like some problem with grounding your laptop. Sometimes peripherals will create a hissing sound when they don't have the same ground potential. Maybe try getting a new adapter cord, as the ground prong (The big round one if you're in the US) may be broken. If you go to an Apple store and be extra nice, they may give you a new cord for free, and save you 60 bucks.
Oh and you probably don't need a new power brick, just the big cord part that attaches to it.
I'll be sure to give ths a try. Thank you!
buzzing in external audio when charging
