Maybe I'm an idiot, but, I thought that I could change the way my ATV3 connects to the network on the fly without affecting Airplay mirroring from my Mac. Here's the deets: Apple TV 3, running the latest firmware available for it. My iMac late 2012 iMac is running Yosemite 10.10.2. Today, I was playing around with Borderlands 2 in Airplay Display mode on my Pioneer PDP. All was well except for some annoying lag from the time I moved my mouse to the time my image moved on the HDTV. I switched over to Game mode, which I'll be darned if it didn't help a smidgen. Then, I thought to myself "Self. I wonder if I could get rid of any more lag if I direct connected my ATV3 to my router via ethernet cable instead of wi-fi?" Myself thought it was a good idea, and I fished out a cable and connected it to the router. After about 5-8 seconds, my game image faded away, and it took me back to the ATV main screen. I went to my iMac to reactivate Airplay Display, and a pop-up said it couldn't connect. I rebooted my ATV and tried to connect again. No go. Other ATV3 functions work fine. Just not Airplay Display. Any suggestions on what to try next?