1080p Left Display error on Panasonic

Hello - I am have the same problem as this Direct TV user: 

I also have a Panasonic TH50PZ77U that does not display any OnDemand content properly.  When I try to purchase a movie, it only display in the top left-hand side of the screen, and the bottom display is cut off.  Original phone calls with DTV Customer Service told me that the video I was trying to watch was corrupted, but this happens to every OnDemand video I've tried since that phone call.  I'm starting to think it's the TV.  Does anyone have any suggestions on how to fix this?  Or if it really is a problem with the TV not recognizing the format?  Thanks in advance!