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I thinks that you have its original remote handset with you now, and posts this solution. If you don't have it, either buy a new original remote handset or try to get it from any of your friends and relatives, who owns the same model of Mitsubishi Tv, you have now; only to unlock it. After unlock, you can use any other remote control. Mitsubishi sets use a four-digit code for a V-Chip locked program, view a locked TV, cancel the lock, or to enter the V-Chip lock menus. You can view the locked shows on the TV set by pressing the number 9 and QV buttons on the remote at the same time, whenever your code is requested. This process temporarily unlocks the TV and asks you to enter a new code. OK.
I had the 65" version of that TV. Loved it, unfortunately it went bad as well. It sounds like the red tube went bad. The tube itself might sell for $400 plus. The installation will take several hours with the alignments which will need to be done. Then after all that you will start to have to worry about the other tubes starting to deteriorate. If there is any red in the picture then the tube is most likely the problem. At tat point I would say buy a new TV. The best bang for the buck if you want size and have the space for it would be the new Samsung or Mitsubishi DLP's. I just installed one at customers house. The 60" Mitsubishi is 1400 at Best Buy
Go to this site you need a flyback its the only onethey sell for an RCA number 259296 cost less than 50.00 and they provide free tech support so you can do the repair yourself which takes about a half hour. a repair shop will charge abut 400 to replace the flyback. heres the link http://servicemanuals.vstore.ca/
Likely to have a bad high voltage transformer: white square thing with large red wire coming out and possible horizontal output transistor maybe C5148: on metal heat sink behind transformer. Must use original transformer Average cost $300.00 according to which repairman. Be sure picture was good before it went out!
Have a sears technician come over ,call them and set up an appointment, they are the best techs out there for tv issues, they will come out even if you did not buy the tv from them. Most of the Sears tv techs come from Philips which closed down their tech shop a while back.
It sounds like you have dirty or faulty fans on your board. please advice.
moving big screens around may throw off the convergence, look to see if you have red,blue or green or all.. ghosts or edges in the picture.
you will need a tech manual ..not owners manual to fix it,
I would call a local tech and hear what he thinks for just a service charge.
Camaroguy: This exact problem happened to us about 8 months ago. A board had to be replaced at a cost of $500. Yesterday, the convergence has gone on the set. You get a blue and yellow shadow on the picture. From what I have been reading, this has happened on a few TVs and it will cost another $500 or so. We refuse to pour more money down the drain so we just went out and bought a new plasma (RCA) for half what it cost us for the Panasonic 4 years ago. We have never had a problem with RCA in the past (two tvs for 20 years a piece).