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you can try taking the back off and dust the innards with compressed air from a air compressor. make sure you get the screws right around the a/v hoookup area in the back. stay clear of the thick yellow or red high voltage line and the box it goes to on the motherboard. If it still does it and your sentimental, take it to the tv shop for an estimate. Pawn shops have those 32 inch 200 lb monsters for cheap, dont forget the hand truck!
Losing one colour probably means failure of electronic components related to the particular colour. It is unlikely adjusting the red settings will fix the problem. Even if it did, the colour balance needs specialist equipment to properly set up.
The F25261TX3 is a 25 inch set that uses the CTC185 series chassis. The 2 most common causes for the set not turning on are a corrupt EPROM and a bad regulator or resistor in the main power supply. This is also the chassis notorious for cracks on the shields around the tuner and microprocessor which causses the EPROM to go corrupt. These are relatively easy and simple things to correct, but the set should be serviced and modified by a qualified tech familiar with that RCA chassis.
If it is truly a 52 inch standard projection set (you have it listed under 32V420T which is not a projection TV) and your 3 colors (red, green and blue) are no longer lining up and are all curved on the sides, then it means that your convergence power supply has stopped working. Post the actual model and chassis number and a better description of the picture here and I will be able to assist you further.