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Actually, the CM0747 power supply is readily available as a replacement part, I gave you its web store link earlier. However, the amplifiers that it was sold with, the "old" 7777 and 7778, are NLA. The "new" 7777 and 7778 amps utilize a different power supply.
Is there any chance they installed a distribution amplifier (powered splitter) and used the 0747 as its power supply? That would be the only thing that would make any sense. Otherwise, their excuse is nonsense.
As far as the antenna itself is concerned, the only likely fault that it might have is water ingress into the loop which was an intermittent issue with units manufactured several years ago. It that is found to be the case, call our customer service department for a warranty replacement loop.
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