231 Views 1 Reply Latest reply: Aug 22, 2013 6:33 AM by braden85
I have an article that seems to describe your issue. That information can be found right here:
Certain external monitors and LCD displays: Certain displays may emit harmonic interference, especially in the 2.4GHz band between channels 11 and 14. This interference may be at its worst if you have a portable computer with the lid closed and an external monitor connected to it. Try changing your access point to use 5 Ghz or a lower 2.4 GHz channel.
This information is taken from the following article:
Take care, and thanks for visiting the Apple Support Communities.