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Pretty much like you said: LC resonant circuits have some unique properties.
Electronic_M remarked about the resonance working.
Besides, probably also the core (or some section, I dunno) of some type of reg trafos are made to saturate so the voltage wants to rise but core says "no" (saturated trafo). I believe some are a combination of the 2 (resonant/saturating). I dunno about the specific of this TV.
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