Naturally, I Googled the above info and found that the likely problem was a faulty Rotor Position Sensor http://www.appliancepartspros.com/lg-rotor-position-sensor-6501kw2002a-ap4440680.html
I placed the order on a weekend and received it in less than 2 days.
After watching a short video on replacing this part, I had the new one installed in less than 20 minutes.