[QUAD-L] "E100-open or short in controller or motor"

[hellodaveoc]

Does anyone here have a hint about what this error  is on a TDX5 Quantum?  
I was just sitting there - honest. then the error  code read "E100 - open or 
short in controller or motor" - I'm thinking that  covers a lot of 
territory so we're taking it apart piece be piece.  Bummer!
 
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azdave