I just took in the set to get it fixed because it was shutting off after being on a few moments. The guy said he couldn't get the part he needed and dropped it back off. Now it stays on but there is a rainbow going in different directions on the screen. There are green, blue and red stripes that do not touch each other but go parallel. Is this from a magnet? Can I fix this without taking it back in?
Sounds to me the set was handled rough,Mabe landed on it's face in trandsport? Or dropped on a corner of the cabinet? check for dents or bruses on the cabinet. Otherwise go back to the shop where it was sapose to be repaired and explain what you have to the personin chargeand ask if they would try to demagnatise the set for you,they could have left the demag/coil plug out and it can cause the sametype problem.
Good Luck Walter
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Re: Rainbow on the tv
The only time I have seen that symptom is when the shadow mask of the picture tube gets loose,What that means is you might be looking at a bad crt,color splashes could be a purity problem but rainbow lines are not.Sometimes that happens by itself or by being drop.Good luck
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If it looks like a rainbow of some sort and a standard picture tube set it is degaussing problem--set does this for a moment when turned on and if does not complete you get this---to prove this with set on turn the set to face another direction and see if the colors you see change or shift position.
There are things that can be done if this is the case.
you have a shorted green CRT that is affecting the other crts the short is internat to the crt that leaves what is called retrace lines. if the set is more than three years old then replace all three guns.
If your lucky the degausser ckt will fix your rainbow in a few days. When the set is cold and on power up, the degausser works before the picture comes up(hum noise). Worst case, the shadow mask is messed up and it will never be right.
you need to borrow or rent from a repair shop a degaussing coil. Its a big coil of wire that plugs in and has a switch on it. How you use it? With the coil plugged in,but not switched on ,hold the coil in front center , about two inches fron the picture tube. Now switch on the coil and slowly rotate the coil in a circle all the way around the picture tube and at the same time pulling slowy away fron the front of the picture tube. Keep doing the circular motion till you reach about three feet from the front of the tube, turn the coil sideways fron the tube and quickly shut off the coil. This is done with the tv set on. The set should look clear now ,with no color blotches on the corners or the rest of the picture. If it dosent then the pictre tube is bad. If it does look good, shut off the tv set for a hour or so , turn back on the tv set, Is the colors back on the screen. Yes , then ther thermistor or degaussing circuit needs to be serviced, and this is something you will need to call in a tech to service for you cause theres extremly high voltage inside these sets and not for a handi-person to tinker with. But if its good then your all set. Good Luck