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The convergence ICs have failed which is very common when the set has been moved as a wek IC wont allow the color to be moved. You can get the PT52WX53G convergence repair kit from www.tvrepairworld.com which is the correct one for your model. The kit contains the parts and the CD with repair instructions.
Have you moved the TV recently?, if so the red can(Red source) in the back bottom of the TV may have physically shifted in its holder, this is common when a rear projection tv is moved, jostled. Take the back off, look at the three cans,Red, Blue, Green, see if they all look like they are nested the same, bet the red is shifted a little.Good Luck with it!
you can get the following repair kit at the following link. which contains the parts and the CD which has the instructions on how to do the repair. The kit you need is called the PT-53WX53G, PT-56WX53G, PT- 47WX53G, PT-47wx33G, PT-47WXC43G and PT4743G. Convergence repair kit its at the following link. http://www.tvrepairworld.com/
First of all are you sure you were in the factory menu this step requires alot of known how!!!!!! By using your hand unit only customer controls can be reached unless you know factory menu setup. Which starts like this ,make sure antenna to cable then go to menu set sleep timer to 30 mins exit out now enter ch 124 then press v- down on tv you should now see on top CHK ,also these sets have double convergence patterens.if you were in factory set up for more information look in www.freelists.org techassist/09-2005 .let me know if you still need help.
It's a possibility that this board may be at fault or it is also possible that the convergence amplifiers are drawing too much current and shutting the unit down. This may require replacing both IC's along with a convergence touchup, or as you mentioned, it may simply be the job of swapping the Digital Convergence board PN TNP2AA120S.