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This tv a CRT tube tv?Or a LCD tv or a Plasma tv?The tube tv,the video board that connect to the CRT tube head have problems.The Plasma or a LCD tvs.The main board,call the Tuner board is the cause,this board,that where the incomming broascating signal cable plug into it.CRT tube tv,old technology,must take to tv shop for estimate and repair.Plasma or LCD tvs can tries websites like Shopjimmy.com or Ebay.com to buy a refurbish Tuner board for the replacement.
If you had mentioned that the picture tube is defective and confirmed it is a serious fault. You can rejenuvate the picture tube with a gun tester and short remover.This is not a confirmed solution but you can take a last try. Changing the picture tube is not recommendable for an old set and I would like you to go for a new Tv which will work out cheaper and gauranteed.
Hope you decide sensibly. Good day
ok well "tube" tellys as they are called use an electro magnet to keep the picture stable and colours correct its called gaussing now if you have a speaker or something magnetic nearby it will stuff up the colors but only normally producing colors like purple,green, or white
if you have colors across the screen (that aren't caused by magnetic force) then you need to take it to a repairer or decide wether or not to buy a new one this issue can turn out to be quite hard to fix and can be expensive the different colored electron guns may be burning or burnt out causing pale color or it could be as simple as a power transistor in the H.V supply has shorted out..and causing power issues to the tube.
hope this helps,ben
One of two things, if you have a lot of use on the set or if it's on every day for a long period of time you probably have a worn out picture tube. If this is the case it would far exceed the price of a new set to repair, if a picture tube could even be found for it. The other thing could be open transistors on the CRT circuit board. Based on it's age, it's probably not worth repairing unless it's a very large set 32" or 36" .
Sounds like the red picture tube could be shorting internally which would cause the "all red" condition. In which case you'd have to replace the red tube. Are there horizontal (slightly slanted) lines through the picture as well when this is happening and a very very bright screen? If so it's most likely the tube.
TV's will show funny colors because of magnetic fields affecting the face of the picture tube. A "degaussing" circuit (a coil of wire around the tube and some kind of control circuit) is supposed to try to neutralize this when you turn the set on. Sounds like it's not working correctly in your TV, or may not be strong enough to counter the field.
A real cheap set may have no degaussing at all, or may have a manual degauss button on the back. Does the owner's manual tell you anything? The connector from the coil to the circuit board may be loose. Try reseating it. (Be careful if you take the back off your TV. Make sure it's unplugged, and be aware some parts - especially the picture tube - can store a charge for a while after the set's off and can give you a nasty jolt.) It's also possible the tube is defective, but unlikely unless the set was dropped or exposed to a large magnetic field (like kids playing with a magnet near the face, or turning off a vacuum cleaner right in front of the set).
Hand-held external degaussing coils are available (check eBay). But without seeing exactly how bad the color is under what conditions it's tough to say what's best to try.