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It sounds like you tv need degaussed and you also could have it setting to close to speakers. Unplug the TV for 30Mins, from the wall and when you plug it back in and turn it o0n the degaussingcircuit built inside the TV should fix it.
It sounds like something has left a strong magnetic field on the face of the picture tube, and that's causing the colour distortion. The electron beams from the tube's colour guns are hitting the wrong spots on the face. There is a degaussing circuit in the TV that tries to neutralise such fields every time the set turns on. Sometimes electrical equipment (particularly motorised
appliances like a vacuum sweeper) operating too close to the TV can
leave a field too strong for the degaussing circuit to cope with. Or a failed part in the circuit may have made it inoperative.
A hand-held degaussing coil can be used to remove the field. You can purchase one online, or call a TV service technician. It used to be a standard tool to carry.
Another possibility is that the tube has been damaged. There is a very thin metal mesh screen called the shadow mask behind the face of the tube. If this mask has been warped by a strong magnetic field or a mechanical shock (if the set was dropped, for instance), you will see the same colour distortion. In this case, however, there is no repair other than tube replacement. And that is likely to cost more than a new set with parts and labour.
This is because you have something emitting an electric magnetic pulse close to the TV. Like a large unshielded speaker or large Battery. First thing you need to do is move anything near the TV away and see if that correct the issue. Next would be to degauss the TV. Unfortunately the TV probably does not have a built in degausser.
A degausser is an electro magnet in a circle. you plug it in and run it around the surface of the TV.
Inside the set is a part, usually a thermistor that kicks in the degaussing coil. That is the part that will clear up any stray magnetic field interference. These parts can fail over time. It sound to me like the thermistor has failed and the degaussing process no longer occurs. This is a $10 part and is usually stocked by any TV service shop. Call around and explain that you need this part replaced to get the least expensive service for this set.
The CRT shadow-mask may no longer be degaussing, or the shadow-mask in the CRT is defective.
In or near to the power supply there is a thermoresistor that controls the degausser coils. When the set is turned on this thermoresistor gives a momentary high AC current to the degausser coil with a rapid decay for slightly over a period of about 200 ms or 1/5th of a second.
If this thermoresitor is defective, it will have to be changed to resore the degausser coil to work again.
On rare occasions I have had a bad degausser coil that had to be changed. I have also had the shadow-mask in the CRT become defective. The fix for a bad shadow-mask is to change the CRT. This is not feasible for this TV set!
You should get an experienced TV service tech to fix this for you.
What do you mean by 'strange colors'? Is it colour patches at the corners and edges of the picture? If that is the case, it is asimple case of Degaussing or Demagnetisation. You need to do nothing, The internal degaussing circuits will sort out the problem over the next 2-3 days. Just make sure you have not placed any equipment with magnets or any magnetic source near your Tv (Speakers, Boob Boxes, Walkie Talkies, etc.
your problem is simple
it is called colour patch.
it is basically due to change in direction or you must have shifted or tilted.
it might be due to magnetic effect like spkr,telephone near by it.just remove from that location.
put of the set for 15 minutes &put it on .problem will get clear.
ask tv tech. to degauss it by dega.coil.it hardly 1 second job.