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Don't run it like that anymore and turn down the brightness control! The horizontal and flyback as well as the crt looks promising which is good news, and you're hearing some audio output. But at this point it's time to pull the chassis's and recap and check for out of tolerance resistors.
Do the power supply and the vertical circuits, and you need to look over the horizontal circuits also to avoid any mishaps. You've got a good starting point to keep you busy on. Next time you turn it on could be fatal.
Hopefully, at this point you have the schematic?
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