I have a 50" Sony SXRD rear projection TV and a Sony DVD player with HDMI and with 720p/1080i upscaling. When I watch movies that have dark scenes that are computer generated, such as Sin City or any movie where people are driving at night, I see a green color in the greys. Its all over Sin City. Is this green color from the HDMI cable, the DVD player or something else? Do I need a better DVD player, or is there something I can do to it to get rid of this green tint?