I just purchased the Sony 50 inch SXRD and was delivered last Saturday. Everything looked beautiful out of the box. After a few days, I am seeing graininess on the HD channels. I am new to this so I am not sure if it's the settings that need to be adjusted or a problem with the TV. Has anyone experienced something like this or have any suggestions. I did purchase an extended warranty and called into customer support. I am waiting to hear back when they can come out but was wondering if there was something I can do. Like I said, for a few days it was flawless. I am not using HDMI cables (not sure if that would cause this) and I am using Cox HD DVR box. Thanks for any feedback.