[Yaesu] G800SA Problem

[Robert Pack (NX5M)]

I have a G800SA that turns a 15m beam.  Last time it was used back in March it worked fine.
However, when it was connected for the IARU contest it would not rotate full circle.
I have rotation only from 180 around west to north and it stops cold at about 60 degrees.  I cannot turn it anywhere from 60 on down to the southeast or beyond.  Obviously it does not go into the overlap either.

Anyone had this problem and knows the fix?

Bob NX5M