The usual suspect in the power supply is a failed diode in the voltage multiplier circuit. It IS a pain to melt out the wax in the PS. I did it several times.
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It's not THAT hard to remove the wax. I did it for a friend who has a pair of 9's. The reason it's not THAT hard, as I recall, is that you don't have to remove ALL the wax. Just enough to get to the components.
We tipped the unit on its side over something to collect the wax (like a cake pan) and using a heat gun just melted out enough wax to make the repair. You then gently heat the removed wax and pour it back into the transformer can.