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Can you solder? There may be bad connections on the TV's main board in the deflection circuit. You stated you got it working again, so it's pointing to that issue.
From the BACK. The board is the one with the thick red wires , on the extreme right. It's the high voltage and deflection board, thus called the MAIN board. See the big metal pieces -- those parts on those pieces should be checked for cracked solder since they heat up the most. Big heat sinks for Big Heater Parts, remember that. Smart thing is to only solder the BIG parts, don't do the small ones as they don't get cracks on them. If the solder connections are really close together, make sure you don't bridge the pins with solder. If you do, use solder wick to unbridge the pins. SEE PICTURE BELOW -
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