There is a known hardware bug in the Garmin 600 series relating to the detection of the connection of an external antenna. The GPS is supposed to do this automatically and when it detects an external antenna plugged in it switches out the internal antenna. Unfortunately, this circuitry doesn't work correctly in some versions of the unit and sometimes it get's comfused and thinks there is an external antenna connected when there is not. This causes the behavior you describe because, for all practical purposes, there is no antenna connected.
Garmin can fix this and they've been known to fix it even on units that are out of warranty. There is a fix that can be done by someone with the right equipment and know-how which requires disassembling the unit and bypassing the antenna switch. Not to be attempted by anyone not experienced in micro surface mount PCB re-work.
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Hi Vicki, unless your nuvi was first activated and acquired satellite lock in the last 60 days (unlikely as yours was discontinued a long while ago) then you cannot get free map updates, sorry.
For models activated within the last 60 days Garmin offer a free update to the latest maps if the maps already on the product when it was purchased are an older version. After that, all updats must be paid for.
You simply won't find free map updates legally. Accurate maps cost a fortune to produce and update so nobody gives them away, even the few illegal downloads tend not to work and if they do work are likely to be out of date anyway.
The way that Garmin price their map updates, it's often better to simply buy a new Garmin with the maps pre-installed, although I appreciate that's not the answer you hoped for. If you do buy Garmin updates then you can either go for a one-off update, or for additional cost can buy a lifetime update, but it's limited to the lifetime of the device which is only designed to last three years anyway so may be poor value if you buy the lifetime update and your machine then dies of wear or old age.
Make sure to flip your antenna horizontally or 90 degrees and not vertically or 180 dgrees. I see to many people try to use their older nuvi this way and it does not function well.
Try also updating your unit with the latest firmware from Garmin, this helps sometimes.
You may have moved to a location that is far away from the last location your Garmin nuvi 350 was last use, try to keep your unit on for 30 minutes or more to see if it will acquire GPS sattelites.
Last, certain vehicles have shielded windshields and GPS does not work well with these windshield, this can be eaisly verify by simply taking your nuvi 350 out of your vehicle and turn it on with a clear view to the sky, if that still does not work, it could be a defective GPS receiver or GPS connection in which case you should consider sending it in to Auto Nav 2000 Plus, Inc in San Jose CA or Garmin.
You may also consider replacing your nuvi 350 with a newer model nuvi with fresher map.
Hi I had this problem and its an antenna fault, give garmin a call and see if yours is still under warranty, if it is they will tell you to take it back to the retailor who will call garmin for a RA Number and they will replace it there and then. If your warranty has run out then call garmin to ask about repairs
Best Of Luck
This can be easily fixed....
I had the same problem, I returned first piece and exchanged for the second. Had the same problem with second and took back to Circuit city. The GPS guys took out 3rd one for me and had same problem. Then the manager came who has been using these for couple of years and tried to set the home location 3 times and it worked 3rd time. He did the same for the second returned piece and it also worked. He says since these pieces are programmed for Kansas we need to give 3-4 tried before the piece first 'locates' satellite and then acquires satellite. After the the piece just turned out to be awesome.