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No joy yet. I was hoping that the voltage measurements on the 3 terminal regulators might turn up a dead one, but they all seem to be producing voltages that are within reason for these devices. It is possible that one or more of these chips is not producing the correct voltage, but I have no way of telling without a schematic. I expected to find an indicator of the expected voltage on the board or chip number ( such as LD1117 3.3 for a 3.3 volt regulator), but no such luck! Still researching...
jr
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