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Okay guys, I think I got it. I re-soldered the IC chip in the IF section and the set seems to be acting fine with an original nintendo. Also one of the controls in the "dad panel" had a leg that was poorly soldered from the factory. I filled it in more properly but am unsure if that was the issue.
Looking through casefiles of snowy picture in Sony sets, almost every single one had bad solder joints on the IC chip in the IF section. The only ones that didnt had an issue in the tuner, but the tuner drifted.
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