Gemini GOTO RA Motor Stall Question

I recently bought a used MI-250 GOTO about a month ago and finally got a chance to use it. Everything went well until I got to "Align Star". Chose a star, hit the button and the RA motor stalled. The Dec motor slews just fine, the RA starts and then stops after about a second (I can slew in one second intervals in RA). Here is what I have tried with the same result: I tried a different known good cable. I reversed the RA and Dec cables from the Gemini (RA output fed the DEC motor, DEC fed the RA motor) and the same result from the RA motor. I unloaded the mount down to the RA head only-same result. I took the cover off and I can feel just a slight amount of backlash from the polar axis so I know it is not binding in the RA gears. The motor seemingly tracks without a problem, it just can't slew. I think it must be the motor but before I plunk down the money on a new motor, I want to see if I am missing anything. Upon close insection, I did notice cracks in the larger(gear?)casing between the motor and the worm assembly. The DEC motor has no cracks. Thanks for any help.

Hi Chris,
What you describe is typical of a "goto" speed with is set too high. You should scroll down the Gemini menu to Set Up - Hand Controller - Speed - Goto speed and set it up to a lower value. Try 600 for example. Hope this helps.
Francois