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It'll have a big 'ol regulator for sure. If there wasn't one, the picture would jump allover the place at the slightest voltage variation. You would usually see this if you turned up the volume. Same thing happens if you use a wall wart of too little amperage (usually these like to at LEAST see 750mA or so....more typically 1A).
Since you ARE getting "somethng"...such as it is, I would suspect you DO have power beyond the regulators and switches. Look closely at the flyback area....because you described a small "horizontal squeel" that then stops. Sounds ALOT like the horizontal oscillator starts, and then is shut down by a horizontal output or HV problem. Try looking at the set running in a dark room and see if the filaments are coming on behind the CRT. You should quite easily see the orange glow. Do you get ANY audio at all?
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My current "holy grail" is trying to get enough parts together to get a Singer TV6U going. Been kicking my ass for nearly a year now :-P
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