I have had a Mitsubishi 3000 hooked up to my Directv HD DVR for over a year. I just moved to a new home and have everything hooked back up but now when I go and change the channel, I get a "no signal" message on the screen when I try and tune in certain channels. I have to power down my HD DVR and power it back up to get the channel to get a lock. Has anyone else experienced this problem? It was working fine before I made the move. I have changed out the HDMI cable and it does the same thing with the new cable. I have hooked up the rgb cables as well to and it has the same problem. I am using a Yamaha receiver as my A/V receiver. Any ideas???:confused: