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My 890SD/5/0016 has 720VDC buss but no low voltage on control card or HMI display

Originally the drive wouldn't start.  

I don't recall the exact error, but it was something to the effect of buss precharge failure

But, the DC buss was at 720V.

Now the HMI doesn't light and there is no +/-10VDC on X12, even though the buss is 720VDC.