Chosen Solution
I just found my old 2600 in my garage, I cleaned it up and even fixed one of the controllers that was broken inside, so when I plug it in and turn it on the screen seems a lot darker than I remember it looking, what could cause this? everything else works fine.
Try checking the screen settings on your television. On my LG I can set different lighting settings for different inputs, and some cause the screen to appear darker than others. Each input on your television will have different pictureh modes so setting it on one input will not automatically transfer it over to another.
