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That model is famous for having CRT issues. Chances are the Red CRT or one of the CRT drive board is whats causing the issue. Usually if the set shuts down shortly after turning all red then its the CRT. But if it just turns red and keeps working it could be one of the CRT boards dropping out causing the Red to become dominate.
All projection TV sets have two very common problems. One is convergence ( 3D/Warped video) the other is CRT fluid ( Dull Video). Here are more details and solutions for both.
Common Problem #1) Convergence has gone out
Projection TV sets need to have all three colors - RED - BLUE - GREEN - lined up correctly on the screen in order for the video to look normal. When its out of alignment the video will look 3D, wavy, distorted, etc. Most of the time you just need to adjust your convergence in the TV menu. If you cannot adjust it in the menu - then your convergence is broken and needs to be repaired.
This is a very common failure on these projection sets and a fairly simple DIY fix. All projection sets including Samsung, RCA, Sony, Philip Magnavox, Panasonic, Pioneer, Akai, GE, JVC, Toshiba, and others at some point will have the same problem.
Common Symptoms include....
Screen looks 3D
Colors don't line up
One or more colors can't be adjusted when using the convergence menu.
Screen is bowed or warped.
TV shuts off after powering on. Power light will blink. TV may also make a chirping noise.
Here are some pics of convergence problems.
Common Problem #2) CRT Fluid is Cloudy
Projection TV tubes have a liquid coolant that is used to keep them from overheating. After many years the coolant in the blue and green tubes will become cloudy and cause the screen to look dull, red/orange, etc. You may even see halos around images.
It depends on what the problem actually is; are the streaks colors like red or blue outlines around lettering etc?
The more you tell me the better I can help. I will post a photo or two of what convergence problems look like. This set is also prone to another problem, on a blank video input look at the screen: you should only see Video 1 (etc) and if you see faint curved lines (red, green or blue) and or the back ground is also wrong color you have the second problem.
let me know which it is.. If this information helped you rate this solution as very helpful as I do this here for free.
2 Things can cause this Red Tube needs to be adjust down on screen drive control or you need to replace Both of your STK ICS. Sony has alot of problems with Defective Tubes.Red and Blue Shorted out the most.
Every person I know who purchased this very expensive unit has had this problem early in the life of the TV. Sony is no help. Sony will suggest you take it to a repair facility. Sony from years ago is not the Sony of today. It was expensive to purchase and it will gouge you with repairs. Your choice. I eventually discarded my set and purchased a JVC. These rear projection TV's are garbage and Sony knows it and they dont care. Seems like the last for only a few years and then major problems occur. My solution replace it!