Everything on the television was working fine until recently. Without notice, when we turned on the TV and switched to Video1 to use our gaming systems, the image and color are not correct. The image is dark and heavily red tinted. The image is also very grainy. The sound is fine and we have tried different sets of cables. The cable reception is perfectly fine as is the image on the Video 2 and 3 input. Any ideas on what problem might be and how to correct it?