I have a 530 which was intermittently receiving sat signals for about a day then it quit. I disassembled it and found that the circuit trace that connects to the GPS antenna had cracked at the edge of the solder connection. I added a short jumper on the trace and that fixed the problem. Note: very fine soldering. Not for the novis.
Updating your GPS's software will sometimes correct that problem. Go to garmin's site to find the official updates. A side note though, opening your Rino like ebretag did will void your warranty as well as break your seal on the unit, ruining your IPX7 weather proofness.
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you have to be outside or in a non steel covered building to get a good signal, i have found on my tomtom that sometimes it would scan for sats for 2 mins and nothing, then i would shut it off and restart and then aquire the sats, there is a time in spring and fall when the sun interfers with the sat signal and you wont get anything for 30 mins
When I try to turn it on it comes up with the “rino” initialization screen and buzzes/vibrates at 5 second intervals.It never goes past this screen.Occasionally, for about 1 second a small white bar will appear across the bottom saying “0%.I’ve recharged the Li battery and got the same result.I’ve tried it while connected to the charger.Same result.I’ve tried using the optional 4 AA battery pack with fresh alkaline batteries.Same result.Did the factory reboot (page/enter/power buttons). Same – except instead of a buzz/vibrate I get the tone every 5 seconds. Have to remove battery to turn off.
Contacted Garmin tech support today (10/22) - hope to hear from them soon.
If you have the older antenna (RAY120) they are somewhat prone to failure and may likely be bad. From the chart page you can press "menu" and then "GPS setup". There you will be able to see how many sattellites the antenna is receiving. If you see a couple of sats and never enough to get a fix (3 or more) it is almost certainly a bad antenna. The new version is the RAY125, much faster and better.