You've probably got this sorted by now, but for future reference, hand turning should work fine. But if not, My R-Com had stopped turning, and it turned out to be a slipped elastic band, replacing the band and putting a small strip of tape over to prevent future slips did the trick great.
As a side point, I've had my R-Com for nearly 2 years and it recently fused too, and after buying a replacement it fused within 10 hours, does anyone know if this is a common problem? I was going to try a whole new one of the same type, but now I'm thinking I might have more luck with a different brand?