external monitors make noise when external monitor is connected

Question

Level 1

0 points

external monitors make noise when external monitor is connected

Late 2011 15" Macbook Pro I have an issue where my external monitors make noise when external monitor is connected at the same time. The second I unplug my secondary monitor from the Thunderbolt port then the sound dissapears. I am assuming its a grounding issue but I went out and bought a power conditioner to plug everything into hoping it would resolve my issue but no luck. Any ideas are always helpful, I will post if I make progress

Thanks

MacBook Pro, OS X Mountain Lion (10.8.4), 16gb ram, 256gb SSD, 750gb HHD, i7

Posted on Aug 26, 2013 10:23 AM

Reply

Answer 1

Best reply

rcchristo Author

Level 1

0 points

Aug 26, 2013 10:28 AM in response to rcchristo

Looks like I found the answer to my own problem. I tried to isolate the monitors power from the same power source of the speakers and had no luck. I then decided I had enough spare power cords for the monitor/speakers laying around that I would just break the third plug (ground) off the monitors power cord (the side that plugs into the wall. Well sure as sh#t this worked and the noise is gone. The additional ground was creating noise as expected.

Reply