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Replace ALL caps you still have jumped. You DOUBLE the value when two caps are in parallel. Check the resistors in the vertical circuit very carefully, remove one end before you measure unless it dead-ends by itself to a tube-socket pin. It's a Catch-22 either way you go, heating one end when removing it (or replacing caps) can change the value either temporarily or permanently. If a resistor changes value appreciably when heated, it's probably bad anyway. Measure the voltage up and down the B+ divider as well, if everything else fed after the Vert stage is low as well, that may indicate a problem. It's been 20+ years since I worked on mine and I just can't recall the schematic...
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