There is a black spot across the screen - Toshiba 57H81 57" Rear Projection Television

it sounds like you have a small crack on your screen that has gotten worse over time, these black areas are where the lcd crystals aren't active anymore, unfortunately there isn't allot you can do apart from buy a new screen or put up with the black lines.

optical engine failure. that technology is called DLP digital light processing and it uses a device called a DMD digital micomirror device that has millions of mirrors onthe face and they independtly move and sometimes they can get stuck or not move and cause spots black or white across the entire picture. i suggest calling customer support for possible repair accomodation

Sorry Sir but your LCD TV got wet... it can be splash with too much water, an animal urinate on the panel, etc....
this kind of black spot is caused when the LCD Panel Terminals got wet, this terminals are located at the lower side of the LCD Panel.

Hi , it seems you are experimenting a light engine problem.Here's how your tv works: http://www.youtube.com/watch?v=ZLLHnQ4y-wo Basically there's 3 LCD chips that create the colors and image by blending together.When these chips start to melt you will get those blue spots, pixilation even vertical lines.You will need to replace the light engine. Have a blessed one!

You'll have to live with it, LCD screens are not repairable, they're only replaceable.

one of the floresant bulbs has fail there is a place in Haverhill Ma called Tops Electronics that can fix you up really quick but you will have to ship it to them they do good work there
their new name is pinnacle solutions group over 30 year serviceing

Could possible be your television.

Or maybe your Xbox is overheating.

Try placing your Xbox in a cool spot, direct a fan at it, etc.

Or try getting a new TV or Xbox.

Uh yah, I don`t think I`ve ever heard of that.