Magellan RoadMate 700 GPS Receiver "13" Questions

...rings back on screw mounts 12. PLUG RF CABLE BACK IN! (signal will be zero if this doesn't happen) 13. Fit together front/back and screw back

Magellan Roadmate 760 The rodamte 760, I purchased about 13 months a go. when I turn it on it just keep on serching for signal. I called technical support and they told me to go into configeration and