I cant get it to work on full screen - Toshiba 62HM95 62" HDTV

I am having this same problem as this one above (62HM95). The issue I'm having is that it will also not work full screen. I selected the 'Split' option on the remote and the picture on the left is fine... absolutely clean and perfect, with audio. The picture on the right is completely distorted in very strange colors (mostly constant variations of purple), with audio as well. You should note, that the same video information was feed into different imputes to select for the split. In other words, I feed the cable stream into the TV using the component video (Y B R) as well as the coaxial cable and selected both options for the purposes of displaying the same information side-by-side. On screen I selected video option four (4 for color stream HD) and option (0 for cable/antenna). If I highlight either side and select one of them (4 or 0) the screen goes full screen and I see nothing but one solid color of purple. I've researched the purple and they call it 'Electric Purple'. That is all I see... just the solid purple, with the audio. What I have also noticed is that, If toggle between imputes while in the full screen option and come back to either option (4 or 0) the image plays/appears OK for about 2 seconds then goes back to solid purple. I just can't understand why this is happening especially when the on-screen menu displays perfectly fine. I cannot enjoy this TV by only watching half of it in split mode. Besides the multiple replacement bulbs I've had to buy I've completely had it with this TV I am having this same problem as this one above (62HM95). The issue I'm having is that it will also not work full screen. I selected the 'Split' option on the remote and the picture on the left is fine... absolutely clean and perfect, with audio. The picture on the right is completely distorted in very strange colors (mostly constant variations of purple), with audio as well. You should note, that the same video information was feed into different imputes to select for the split. In other words, I feed the cable stream into the TV using the component video (Y B R) as well as the coaxial cable and selected both options for the purposes of displaying the same information side-by-side. On screen I selected video option four (4 for color stream HD) and option (0 for cable/antenna). If I highlight either side and select one of them (4 or 0) the screen goes full screen and I see nothing but one solid color of purple. I've researched the purple and they call it 'Electric Purple'. That is all I see... just the solid purple, with the audio. What I have also noticed is that, If toggle between imputes while in the full screen option and come back to either option (4 or 0) the image plays/appears OK for about 2 seconds then goes back to solid purple. I just can't understand why this is happening especially when the on-screen menu displays perfectly fine. I cannot enjoy this TV by only watching half of it in split mode. Besides the multiple replacement bulbs I've had to buy I've completely had it with this TV