I have Fios and use a Mac. The last two times using Roku, I am able to select and view the netflex movie for 10 or 15 minutes. The screen then goes dark, turns green, and while I receive the audio portion, the visual portion of the movie is lost (since the screen is green). I have a Denon receiver. I try to re-boot the system but to no avail. Solution would be welcome. thanks.