This is a 8 year old Mitsubishi WS-73711 73 in. Rear Projection TV.
The picture on the screen is seperate for each color creating a ghosting effect. Its pretty bad. Everything is showing a double on the screen and you cannot make out anything. Even the menu items are hard to read.
I thought it was convergence problem but setting it to factory default is not solving the problem. It does not even make a difference.
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Tv have a problems known as a convergence problems,it dead.The tv have colors lines R,G,B mis alignment,have colors pictures shadows or 3D pictures look alike.The tv convergence board the 2 STK convergence ICS and some or all it resistors are dead.These parts on the tv convergence board,must be replaced to solved the tv convergence picture problems.The shop,will cost u like $300-350 for parts and labors.
This is a very common failure on Projection sets. Its called a convergence problem.
You may have one or more of the following symptoms.
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. No Audio / No Video - Makes Chirping Sounds You can see some examples and find a fix here...
The issue you are having could be caused by your television needing the convergence adjusted. During production your televison has the three picture tubes that are converged to form a single image on the screen. Over time these can come out of adjustment.
If you go to this link http://download.jazel.net/misc/filecache/b8/b89bca4c8b740315d378e8ed030461c5_1227-517SeriesOwnersGuide.pdf and check pages 57 and 58, it gives you a very detailed guide on adjusting your convergence. I am aware this model number is slightly different than yours, but I own a 47" Mitsubishi and this is the exact procedure we use to do our convergence so I am confident it is fairly universal.
The reason that they might snap back into place when you hit the base is that they are actually three different colored picture tubes or rods. By hitting the unit, you are moving these. I would suggest doing convergence on a regular basis and to avoid hitting your tv. :)