I'm having hdmi "no signal detected" issue with the brand new apple tv that I just purchased. It Happens when I select different hdmi input or turn off the tv and turn it right back on. There are two hdmi ports on my HDTV. Apple tv and the xbox are plugged in to the ports. I tried different hdmi cables and other hdmi port but I'm having the same issues. I have to unplug/plug the power from apple tv every time this happens. My hdtv is pioneer krp500m. Please help.