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Actually it was a customer next door, who was more than willing to let me test on theirs. The boot rom and memory didn't do anything, tried unplugging components to no avail, but...
Finally..the Composite Power Supply is bad! Switched it to another unit and the problem moved to the other machine. Installed Good one and it's fine. It must have been shorted somewhere, it killed the voltage from the main power supply and that really confused me. Time to start the Weekend after 8 hours on that one! Thanks for all the input!
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