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I fixed the hot Zenith. Turned out to be a bad degaussing coil. With the coil plugged into the chassis, I got a 5 ohm reading between the wide blade of the power plug and cold ground. With the plug removed, I got an open circuit. Checking from the degaussing coil itself to the CRT ground strap showed a short. Evidently, there was an area of exposed bare wire on the degaussing coil that was making contact with the CRT ground strap. To be safe, I replaced the degaussing coil with one from a junk TV and it appears to be fine now.
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