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Re: magnavox 19prc1 0121
There aren't any adjustments anymore. This can happen as parts inside age and values change. Also solder connections can fail over time and cause problems. The problem you describe can be in any of several areas of the set. There really isn't anything you can do yourself to repair this. If you want to keep the TV you can get an estimate for repair, but this might be a good time to check out sale prices on new TV's and think about replacing it.
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You either have a cold solder joint in your horizontal deflection circuits or your or in your horizontal output circuit. please be careful due to the fly-back transformer still holds power even unplugged until you discharge it.( ground it out). Hope this helps.
Subjecting a TV (or other electronic devices for that matter) to moisture etc is not good for them.
From your description, it sounds like the high voltage transformer (HVT) is arcing. This can potentially destroy the circuit boards, or even cause the set to catch fire.
Fiddling with unrelated controls will just create more problems, but not solve the original one.
As TV's can store potentially lethal voltages (around 25 thousand volts!) long after power is disconnected, if you are not experienced in repairing them, you would be well advised to take it to someone who is.
Magnavox are known for the HVT problem and personally, I wouldn't waste money repairing one.
try adjusting the green screen control. remove the front bottom panel of the tv by removing any screws holding it in place. gently pull of the front panel, there are gromets holding it in place, you will be able to gently remove the front, just make sure you get all those screws. now reove the small wodden or plastioc panel. now you will see the screen/focus assy. check to see of the screen controls are the top 3 or bottom 3. adjusted the center screen it's the green one, the other 2 are the red & blue. it is best to adjust in a dark room where the lines will show up easier. good luck