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Check and replace the deflection yoke. If you wish to get some details; check the site linked here. Pull up older posts. Surf the site with patience. http://electronicshelponline.blogspot.com/
If the set had a burnt CL031 Capacitor and its now squealing you may have a broken CRT if not the deflection board itself will need replacement. But I would inspect each CRT neck real good even loosen the yoke as often they will crack right at the yokes clamp line.
Hello
You just replace the capacitor fitted very near to the horizontal output transistor,[freewheeling capacitor], there may be one or two of them, whcih comes to a value of 3900pf to 6700pf 2000V or so. It is connected to the negative rail and the collector of the horizontal output transitor. If it gets opened, or its value gets reduced, this fault will occur. If so the transistor you replace will get shorted as you swich on the power to TV.
The second one is deflection yoke short. If so the transistor said above will overheat within seconds. Even a single winding inside the horizontal deflection yoke shors, it puts a tremendous load to flyback transformer, which in turn effects the transistor.
After replacing the above said capacitor, you do one thing to make sure about whether there is a short inside the yoke or not. It cannot be measured by normal methods. Fore that, unplug the base card from picture tube and place it somewhere near without getting any of its contacts to other parts inside your TV. This time only the EHT chord will be connected to picture tube. Unplug the horizontal yoke connection from main board. Switch on the tv, and wait for some time, say at about 10 seconds, and check whether the transistor gets overheated or not If it does overheats now also, the winding or EHT retifier diodes inside your flyback transformer has some trouble, and it should be replaced with same type and number. If it does not overheats now, the deflection yoke's winding have some short in it. Ok.
NB: Never connect the TV with base card is in postion while deflection yoke connection is isolated. keep it unpluged.
Could be one of three things the yokes, the flyback transformer or the picture tubes, all will be a costly repair. If it was mine I would invest the money in a new one.
It could be a Flyback transformer problem. Check th flyback for loose solder move the transformer a little bit and look on the underside of the circuit board. be careful ther may be current left over. Put your left hand in your pocket.or away from you. if it is not that you may have a faulty circuit board (burnt resistors) near the yoke going to the screen.
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