ballystick 74 Posted January 7, 2015 Share Posted January 7, 2015 I know Navman are unreliable etc. etc., but today for some reason ours won't go past the start up screen to show satellites etc., any ideas? I have heard before about a restart function?? Link to post Share on other sites
Island Time 1,247 Posted January 7, 2015 Share Posted January 7, 2015 When they start they normally run a POST (Power on self test) Sounds like this might have failed, or failed to detect required devices (like GPS antenna??) Check all connections, turn it off, wait 10 secs, turn it on. If you give us a model number we may be able to provide further help if that does not resolve anything... Link to post Share on other sites
ballystick 74 Posted January 7, 2015 Author Share Posted January 7, 2015 Its a 5500 model Link to post Share on other sites
Island Time 1,247 Posted January 7, 2015 Share Posted January 7, 2015 Ok, a couple of possibilities. If it sits at the sat screen for a long time, it is likely to be either the location storage has failed (flat internal battery??) and it is trying to locate again. This can be 3-5 mins or more before it "finds" itself. If it does not find itself, then it won't move on, and the problem is likely to be the GPS antenna or connections - it can't "see" the satellites. How long have you left it on the satellite/gps startup screen?? you could try, from the manual, the restart GPS option - if the unit responds at all?? 13-3 DGPS setup Internal GPS Disable or enable the TRACKER’s internal GPS receiver. Disable this if a non-standard GPS antenna that sends NMEA data is installed. DGPS Source Enables or disables the satellite based DGPS correction (see section 7). The options are None or WAAS/EGNOS. Do not enable WAAS/EGNOS outside their coverage areas or the accuracy of the position might be degraded. WAAS covers all of the USA and most of Canada. EGNOS will cover most of Western Europe when it becomes operational about the end of 2003. Restart GPS Restarts the internal GPS receiver for servicing or troubleshooting. The GPS receiver takes up to three minutes to restart. The satellite display shows the status of the GPS receiver (see section 7). Link to post Share on other sites
ballystick 74 Posted January 7, 2015 Author Share Posted January 7, 2015 The unit doesn't get to the sat screen, it just sits at the very first Navman image, and stays there for hours. Off and on several times doesn't help, also. Link to post Share on other sites
Island Time 1,247 Posted January 7, 2015 Share Posted January 7, 2015 OK, that's not good. It is failing POST. It Might be a flat battery (soldered to the board) but it is quite likely to be a board failure. The battery can be changed, but requires some soldering expertise, as it is a multi-layered board, and can quite easily be stuffed. One final point - double check the supply voltage at the unit, with it powered on, just to ensure it's not a voltage drop issue.... That's about all I can think of without looking at it. Matt Link to post Share on other sites
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