Sounds like the place you took it to get servicer turned up the screen control when you had no picture problem that was a no vertical causeing a vertical line. but the service center let it run too long causing the line to burn in the tube. very bad for a repair center to do this. cant believe the got you for 600. thats well overboard. now you got a blue convergance problem because its erroring out durrent the blue reading in the test. what you need is to take off the screen turn on the tv. look in each tube for that line. now you can tell what tube needs replaced. then check convergance ic's they are big black ic's that stand up and mounted on a heat sync for cracked solder. might want to go ahead and solder them anyways in case you cant see or dont know what your lookin at. also check all the resisters in that area for burns. if that does not fix your problem, try replacing the ic's using mcm electronics. they are on the web. and the part number from the front of the ics.
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