Hours of fun restoring config options.
Isn't it weird that it resets
everything -
except your welcome message??
Master reset has certainly worked for me on 2 occasions. The Legend Cx had a very jittery map display at low speeds - couldn't keep a 'straight ahead' view - in fact I think it was like this from new but it took 6 months before I got around to doing the master reset thing - completely cured it, display now quite solid even when stationary.
The HCx developed a weird routing fault a few months back - at first we thought it was just trying to run the route backwards, kept reversing the route but nothing seemed to come right - eventually worked out that it just wasn't switching its attention to the next waypoint as it passed over an existing one. Tried fiddling the 'off road transition' settings but that didn't fix it, again a master reset did the trick.