I just wanted to let you guys know that I had the same problem. My colors started looking very weird. Kinda like when you change the colors on you computer desktop to a small setting like 256. Coloring looked blocky. I could power my Xbox off and back on and the problem went away, until yesterday. When I powered it off and back on I had no picture at all, only sound. I had wierd purple jagged lines sometimes and just moving white blocks other times. I tried everything. Changing cables, changing televisions, changing resolutions. Then I tried the towel trick. I covered my Xbox in towels and left the power on until it overheated (two flashing red lights). After letting it cool down for about five minutes, everything was perfect again. I don't know why it worked, but it did.
