I have the Pioneer Nex8100. The video playback just recently stop playing. I have a portable harddrive and a sd card conected for video. It also don't have sound when I use Pandora. It'll play the dvd but when I switch sources it stops playing too. Like I said before, it was working fine. I go into a friends house for a few hrs then leave and it stop working. Any advice on how to fix it will be greatly appreciated