When i start up it tells me waiting for gps signal that never happens
Hi, ive a iCN 510. been working fine for 3 years, then suddenly stopped, showing all the same problems as the 2 reports above. i rang navman, thier solution was to reset the GPS using the menu buttons. i tried, it didnt work!!!! their solution to that is a £100 repair bill. is it worth it? my answer, is no. i went out and bought a new one. £229 does everything.
How long are you waiting and are you moving while it is trying to acquire signal? These receivers are using older circuitry that may take up to 20 minutes to first acquire a signal from a cold start. If you are moving it may take longer!!! The good news is that after you have initially acquired a location, if you turn the unit off it will only take a minute or so to reacquire after it has "warmed" up.
Settings Routing next screen Untick 'Demonstrate Route. 
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I have my GPS NAVMAN ICN 510 and I have no reception at all, I can not use it because, I have no GPS signal at.
Got the same problem. The Navman 510 has two yellow bars but a big red circle meaning there's no GPS signal - I've had it switched on for well over an hour!
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