When I try to turn the tv on, I get a dotted green line in the center of the screen. After about a minute, or less, the tv turns itself off and the "timer on" light flashes. I cannot adjust the timer unless the tv is on. Any suggestions?
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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.
Best Educated guess would be your Flyback transformer is failing. Not something you can replace at home and the value of the part may exceed the replacement value of the set by the time labour and part are factored together. DO Not look to replace this part yourself as this part inside the set as it has a high voltage that can be lethal. Output voltage can be around 50,000
Is good that you hit it and it reacts,very likely you have loose conections in different places but for the distorted picture you need to check the horizontal driver transformer and flyback after that is corrected you need to check the complete chassis for loose conections.Take your time.Good luck.
You have whats known in the biz as a cold solder connection on the vertical output IC or on the associated components. Not a job for the handi-man unless you know the issues with safty, and precautions to take with Hi voltage inside of tv sets. Shouldnrt cost much for the local shop to find your problem . Now on rare occations the poor connections are inside the IC and the IC has to be replaced. Good Luck