[ICOM] IC-775 Antenna Tuner Problem

[Jim M.]

This 775DSP seems to tune up fairly well on all bands except 7 and sometimes 14 Mhz.  Into a dummy load, it wont find an SWR below 2 to 1.  If I bypass the tuner, it does read 1:1.  Also there seems to be somewhat more noise from one of the stepper motors that drive the variable loading/tuning capacitors...  I am wondering if a stepper motor has gone bad. Does anyone have experience with failures in these tuners, ...before going back to the factory, what is a common failure?  
Thanks N4BE