Hey all. Have a 62MX195 that I have owned for 13 months. Yep, just went out of warranty

Have something new that has started and I do not understand it. Wonder if any one might have a suggestion.
I have have two HDMI devices connected. One HD Directv DVR that has been connected since I got the TV. The other is a upconverting DVD burner / VCR. Everything was 'normal' for about 3 months. Within the last month, whenever I change inputs to either HDMI device, the picture size always reverts to Natural when it had been left in Full. I can change it back to Full with either the Pic Size button or by going into the Video Menu. If I then change input to the other HDMI device and then back to the original one, it is back to Natural. Today, I unplugged the set for about 5 minutes to let it reset, but that was of no benefit either.
Nothing has changed in my configuration. I did have the DVD recorder out of service and disconnected for repair for 2 weeks. During that time, I had another DVD player connected to Colorstream 1, but everything is now back to the original configuration. If I re-enable Colorstream 1 input, I can change it to Full and it will stay on that input fine.
I wonder if resetting the two HDMI devices would make a difference. Hmmm... I think I'll try resetting them AND the TV again and see if that does anything for me. Any other ideas out there? Please pass them along. Thanks.