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It shuts the power supply down when you do that. The current for the set flows through the degaussing circuit.
I dislike that degaussing circuit. I disabled a few of them years ago. It has two devices, a thermistor and a a varistor (I can't remember which is which). One looks like a carbon disc with wire attached to each side. The other one looks like a giant ceramic cap that has been dipped in tool handle goo. On a 16, this stuff is on the audio board, right by the power supply diodes. Be careful of the carbon-disc looking one. It is very fragile.
A typical failure involves one of the wires falling off the carbon disc thing, then the giant capacitor thing burns, filling the room with nasty smelling smoke. I'm sure a lot of these sets got junked because they convinced their owners that they "caught on fire".
However, I dont really think your problem is there. It sounds like you have a short if the lights are dimming. Double check the polarity on the filter caps if you replaced them. Start at the 405 volt tap, and trace the wiring down through the lower voltage taps on the power supply, looking for anything that could have got pushed/shorted.
John
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