Hello, started having a problem with my 660, it seems as though somethings is going wrong internally on my unit, it looses sat signal and asks to verify position and will not regain signal unless you unplug the unit and leave it off for about 30min. After the 30 min, I can restart the unit, and it finds it's correct location and is fine for another maybe 10 min then again looses signal. and I have to go through the same thing once again.
any ideas? I love the unit, but this is getting old.
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Get a multi meter to check what the battery is putting out, in volts, at no load then what it does as you open the throttle. A "duff" battery might show a decent reading off load but when asked to supply a bit of current (power) the voltage drops due to the internal resistance of the cells. The same would happen if there was a bad connection, but you would read that at motor side.
update the firmware of the unit on garmins website www.garmin.com
I have seen this fix that problem multiple times. If you already have the current version reload it. If that all fails then its probably something physically wrong with it and needs to be sent in for repairs.
Try to take it out of the car so that it has a completely unobstructed view of the sky. See if the signal problem is resolved. If that resolves the problem then you will need to find another place to attach it to the insude of the card. If that doesn't resolve the signal problem you will need to return it to the manufacturer. They have a program where they rebuild it for a flat fee regardless of what is wrong with the device.
Have you loaded a lot of JPGs or MP3s on the internal memory? If so, you have reduced the amount of memory available to the 660's OS. Not sure if the 660 stores calculated routes directly to the internal flash memory, but it is very likely, since it keeps your route when you power it down.
To unload the internal memory, consider buying an SD card - they are cheap right now. As a matter of fact, I just ordered an 8GB SD card for my 660 from Amazon for $13. The 4GB and 2GB cards are available for about $7 and $3 respectively. Drrrrrt cheap!
You can access the internal memory of the 660 on your computer with the USB cable you got with the 660. The two folders to focus on are the JPEG and MP3 folders. Simply copy these folders' contents to the root directory of the SD card, and then go into each folder in the GPS memory and delete the MP3s and JPEGs you added - should work better. The 660 will recognize the files on the card if left in folders named identically to the folders in the internal memory.
If you didn't add any content to the internal memory, that is a different issue altogether, probably something to discuss with Garmin. Could be as simple as upgrading the firmware. Make sure you select the correct version though, or it could be a fancy brick! Go here for the nuvi 660:
I had the same problems with my 70lb, my motor just quit while on the lake, took it to a minn kota service repair shop. I had two issues. One was the little magnet under the button on the foot pedal got recessed to far down, the tech told me if it happened again pop the button off and pull the magnet up some. Simple fix. I took it home put it back on the boat and nothing just a slight ticking noise heard from the pedal with no prop movement. So I thought maybe somethin was wrong with one of my batteries. Unhooked everything, tested both of them, all good. Even though there was hardly any corrosion, I clean everything, hooked it up and "WALLA"! Power! Problem solved, for now. Waitng to test again out on the lake
folks, the garmins have an on-board battery that needs to be powered up (at least occasionally) via the usb port - like from your computer. just using the dc car power cord does nothing for this battery. i've had this exact same problem on both my 760 and 780 nuvi units. fixed it using the usb charge. seems to run down differently for all the various nuvi models. my regular charge will hold for 7 hours on my old 660, my 760 and 780 work about 5 hours. my 'power up' failed on the 660 after 10 months with no internal battery charge, but the 7xx models only took about 5-6 months to 'fail.' hope this helps. jack b :-) in midland, tx usa
Not updating your GPS isn't going to cause signal loss. Push the options key, go to configuration, then to diagnostics, scroll down.. select reset gps. it will say it takes 5 min. to relocate.. etc. see if that fixes it. If it doesn't fix then when you restart your unit and the user menu appears. Press "-" key and "repeat" button at the same time.. then select clear gps user data or.. user data gps... something to that nature.. Hope this works out for ya.