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Your projection lenses are probably covered in dust. My TV did the same thing with the blue color on the right side. Usually you can get to the projectors from the bottom front or back. Goo luck.
I like the Tech Most likely did a Color Configuration , Go into the Menu and Use the Arrow keys to scroll and look for " Color Calibration " run the test make sure you don't have " Bleeding" this is a term used by Color Tech's like myself to describe that Color are mixing together which is causing your current problem.
This is a convergence problem and is either bad connections at the convergence ICs or defective ICs. If you can solder, you can repair this yourself. Let me know if you wish to repair this and I can provide you with additional details.
If one or more of the colors, red, green or blue have separated from each other and you can`t correct the problem using the convergence procedure as described in the users manual, that would indicate you have a convergence problem. Bad solder connections on the convergence output chips are common. If the set had a rough ride down the stairs while moving, that may have facilitated in exposing a preexisting condition. However, the most likely cause is the natural failure of one of the convergence output chips and or related components and not the move. The fix is to have a qualified technician address the problem. This is not a do it yourself job.
My Dad had a Hitachi rear projection with same problem blue and red were fine green was out of allignment and could not fix. Problem was the acual projector inside TV the cost for repair was more than TV was worth went out bought plasma.
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