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I fought an issue with high HOT current, I had checked all of the resistors and they measured good. Finally I started shotgun replacing resistors in the horizonal circuit, each pulled resistor measured good until ultimately had a resistor break apart as soon as I clipped the first lead. The resistor either failed after I measured it or the fact that it easily broke maybe it only was failing under load and somehow measured good.
You could go back and re-measure resistors paying extra attention to visually suspect resistors. Also as others noted pay attention to parallel resistors; with the way some of the B+ is feed to multiple circuits there could be a lot of resistors in parallel. Worst case you can pull a lead to measure, of course then you are 50% towards just replacing the resistor.
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