I've just done this with mine, worked a treatpin or paper clip, and back in the day I used to synch mine with the tomtom app on the pc, it would download current sat locations to the tomtom for faster lock ons. once you've found the satellites, it should be quicker the next time.
its not seeing any at all. dont think there is a reset button
nope, mines a 22. no SD card slot or reset button