Raytheon M92650 Antenna Not Rotating

[nyminute]

I sent the dome in last fall and it checked out good at Raymarine. I cleaned and reconnected the dome and it ran well every try in heated storage and after spring commissioning. Last week I fired it up and again "Antenna Not Rotating" comes on at the 47 seconds to go of a 70 second warm up. I watched the antenna turn and a ever so brief stutter was noticed on the drive pulley (small) at the 50 second mark. The antenna continued to turn but the display indicated otherwise. evidently the stutter signaled an error. I tried this multiple times and often it would show the stutter but continue the countdown until the press power notice appeared and the screen would display the rings but no sweep. I emailed Raytheon but wondered if any CSR's have had an alike experience and or solution? Thanx in advance:huh: