[TowerTalk] Why did my Tailtwister stop turning?

[Barry]

Had a problem over the weekend with my T2X.  It wouldn't turn.  It 
was working fine, then all of a sudden it was stuck at about 300 
degrees.  I tried the usual rocking back and forth to free the sticky 
brake, but no luck.  All the indicator lights were normal.  I tried 
several times over the next 30-45 minutes and it just wouldn't move.  
I gave up the contest in disgust, and the next day checked the rotor 
and it worked fine, as if there was no problem earlier.

The rotor was refurbished about a year ago and looked brand new 
inside and out.  

I don't think it was a thermal cut-out as I was not turning it a lot. 
Would an aging motor starting capacitor act intermittently like this? 
 The control box is about 14 years old.  Any other ideas?
Tnx,
Barry W2UP--
Barry Kutner, W2UP              Internet: w2up at mindspring.com
Newtown, PA                     Frankford Radio Club