brandy00 said:
Scott, My primary tv is a Samsung 46 inch LED 6000 series. This tv is only 3 months old and when I'm playing DVD's the picture is perfect. All the necessary HD components were installed at the factory. The problem is on all channels and on all tv's in my home. It is not as noticeable on the older tv's as the screens are only 20 inch. I have seen instances where the picture is extremely dull, and other times the picture is so bright that it's blinding. I have had TW tech. people here and they say the picture is normal. They are never here when the picture is bad. I don't want to go to satellite as we like the channels available on TW. We can get Boston channels which we prefer for news, and would not be able to receive with satellite.
I'm still not clear on exactly which TWC signals you're watching. Let me step through a few questions to help figure it out, if I might:
1. Is there a cable box involved here? If not, are you tuning analog channels on your TV's tuner? Or are you tuning QAM digital channels (usually these will have a dash or a dot in the middle, like "6.1")?
2. If there is a cable box, are you tuning to SD channels (one, two or three-digit channel numbers) or to the HD channels (in my TWC system, they start at 1000; in others they start at 700)?
3. If there is a cable box, how is it connected to the TV set? HDMI (single thick cable with a flat connection to the set)? Component? (red/green/blue video cables and red/white audio cables) Those are both passing true HD to the set. If you're using a composite connection (yellow video cable/red-white audio) or RF (round cable with a screw connection), you're not passing true HD to the set.
This all matters, a lot, and here's why: with a true digital HD connection (HD box, HDMI or component between the box and the set), you're getting pretty much exactly the bitstream the broadcaster is putting out, and there's not much the cable company can do along the way to screw that up. If you're watching analog (cable straight to the set, or cable box using composite video or RF), most newer sets like your Samsung or my Sony have a huge menu of digital processing options that are designed to make an analog picture look better...but can also very easily make that analog picture look much, much worse.
Without seeing your setup more closely, my guess is that some of those more aggressive signal-processing options are activated in your Samsung. If it's anything like my Sony, there are some menu options such as "automatic light sensor" and "reality correction" that can do just what you're describing with darker and brighter pictures, especially on noisier analog signals.
You might want to go over to AVSForum.com and find the owner's thread for your Samsung model. The odds are VERY good that someone there (or multiple someones) has posted their menu settings. Those are often good starting points from which you can tweak your setup further.