Though I have no idea about this type of color rendering problem, I have checked the rgb panel and it as well as every components in it seems to be working fine. I need a solution to repair, kindly help me out.
they used to make handheld degaussing coils to eliminate residual magnetism on the shadow mask and internal steel parts on the TV... they are about 18" diameter hoops with a power cord and switch and many turns of wire make up the hoop.
iirc, there were some TVs an computer monitors where you were supposed to do the degaussing and purity adjustment with the crt facing north or south to minimize the effects of the earth's magnetic field. gegaussing hoops were common in the USA, the only rod shaped ones i ever saw were small ones made for tape head degaussing. i suppose one of those could be used for a crt in a pinch, but they only cover a small area at a time
the degaussing coil of the crt is driven on startup by a component that was commonly called a degaussing 'posistor'; if you google it for that make of tv you may still find it as a spare part - otherwise if you can salvage one from another tv of the same make there's a good chance it will be an identical component.
When degaussing has no effect, the hole mask inside the CRT could be out of position.
Then the CRT is'nt reperable, because You can't open it.
I had this once long time ago at a Sony TV.
I guess the tube has got a mechanical shock in this case to get this failure.
I've take a look into my TV screen error Book.
1. Degaussing unit failure. Degaussing Coil out of position ( That was testet here ? )
2. Faulty Mask by massive mechanical shock
Fact is the Electronic Ray doesn't fit to the luminiscent pixels at some positions of the screen.
Tanmay could show a grid or a test picture on the screen to see other faults too ( E/W or N/S correction ).