Don't know why the manual does not tell us the "f" codes and expect us to pay $75 to have a tech to "look" at it and pay more for repair. If I know what it means, I may be able to fix it myself or may be cheaper just to replace a cheap made machine.
could be wrong but you can try following: check if any following switches are stuck in operatonal mode(on or engaged) s/s key,bk key,np key,cut key.if that does not help the stop/start pcb needs cleaning or replacement. hope it help
