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I agree about there being an open somewhere that is causing the proper load to not be placed on the power supply.
I will add a word of caution here. Normally, when the set is working properly, the load placed on the power supply is sufficient enough to discharge the filter caps, shortly after the set is turned off. When the proper load is not placed on the power supply, there is often nothing there to discharge the filter capacitors. In this case, the full power supply output voltage can remain on the filter caps and this charge can get your attention in a not so nice way. So, be careful. Use your DMM to make sure the caps are discharged when the set is off. If there is a charge; discharge the caps, preferably through a high wattage/high value power resistor, to ground.
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