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It might be the the socket board on this model not the crt tube. Closely look at each tube these tubes end up contaminated. They start looking like lemonade inside. Usually the blue and green, with the tv off see if the green and blue are as clear as the red with a flashlight. You might want to call a service center. Cheaper in the long run over the cost of a tube.
here is the sulution to ure coror problem take the back of the tv off turn on the tv and look directly into the bulbs blue red and green most likely you will see that the bulbs look cloudy the liquid in the bulbs after time begains to grow a fungus in them u need to get some crestail crear projector bulb fluid take the bulb assembly out of the the tv there r 3 of then take a socket wrench and un screw the bulbs take after draning the curent fluid out therr is a drain plug on the bottom then dissasimble the bulb and clean the projector magnifine lens with windex and a lint free paper towls clean the gasket as well onces you get the filmy fungus out of the bulb make sure u do not touch the inside and get it dirty again put the bulb back together then fill it up with the new fluid make sure to tap out the bubbles then put the plug back on it a reinstall the bulb ONLY DO ONE BULB AT A TIME SO U MIX THEM UP reinstall the wireing to the board then do the next one once ur done u will need to fight with the alinment ajustment inside the tv and also in the programing also might have to set ur colar to if ur scared to do this a tv repair man charges about 350 to 450 $$$ to do trust me u can do it your self just be carfull dont get water on the motherboard
you either have a bad red drive circuit or a bad red crt. try switching the crt socket from the green to the red crt and see if the red crt will light up. If it doesnt you will need a new CRT. If it still doesnt light up then you will need to troubleshoot the red drive circuitry. Let me know if you need more assistance.
Your green CRT socket may have a solder crack, or it could be the CRT developing a short. You can switch the green CRT socket with the one from the red RT and see if it still flashes green. If it does then its your CRT, But if it now flashes Red, Its a problem in the green drive circuitry.Thts the quickest way to locate exactly where your trouble is. If you need anything further let me know.
Your green CRT is shorted. To test put your red crt socket on the green and your red on the green. then try turning up red control if the green now works its not your tube. If the same thing happens with the red socket on the green you can be sure its the green CRT if the green works properly with the red socket, then you have a problem in the green drive circuit and not the CRT. hope this helps.
Sounds like your red gun may be shorted, Try adjusting the red gun down a little see it that helps.You can also switch the blur CRT socket for the red if your screen is still mostly pink then you know for sure its your red tube that needs replacement. If its mostly blue then you have a problem in the red drive circuit.