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your set does not have a bulb it has three CRT'S picture tubes . and if the set is not working its not likely that the crt's have all failed . you most likely have a circuit failure like a high voltage trippler block or some where else in the set . what are the symptoms at start up .
The tv have a problems known as a convergence pictures problems.Tv have any colors lines R,G,B mis alignments,have tv pictures colors shadows or tv pictures 3D look alike?Yes,this problems the tv convergence board it is dead to causes this problems.The tv convergence board must have it parts replaced like 2 STK convergence ICS and some or all of it resistors too.To fixed the tv convergence board to solved the tv convergence pictures problems.The tvs shops will cost u like $300-350 for parts and labors.
Projection TV sets are known to have two common problems. The first problem that is common to these sets is convergence failure. When this happens the TV will usually look 3D, Wavy/Distorted, etc. It may also shutdown and blink an error code.
The second common problem with Projection TV sets is dull video, halos around objects, white looking video, or red overpowers the screen. This is commonly caused by the fluid in the lens being clouded over.
You are haveing form the sounds of it convergence problems. I see this all the time on this set at the shop. FIrst question in customer menu under setup do you have the convergence option if not consult the tips and tricks section under fl231 problem. if you do have this you may have other troubles the convergence is controled by three seprate boards.
firmware upgrade? i am not aware you can ungrade the firmware on this set this is a rca itc222 chasis. there is service software that allows you to diagnose problems. rca offers no firmware update for this set