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I have a packard bell thats doing the exact same thing. I have come to the conclusion the flyback is bad because of the high cathode current and everything else checks ok. The flyback gets so hot after about 45 minutes its soft and melty sticky to the touch.
40 ma doesnt seem like that much but at 400 volts or whatever the b+ is it equals some serious wattage and heat to something that really cant get rid of it.
My symptoms are, purplish on the left side, high cathode current and overheated flyback. The anode voltage is fine, it does drop a tad at max brightness and the picture pulls in a little.
The new flyback is sitting in the box on top the set. Maybe this thread will help motivate me and get it together.
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