GPS Repair Problems? Ask a GPS Technician for Answers ASAP
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A common problem with the 1300 and 1400 series Garmin as the charging ports were not built strong enough and tend to either break off or become loose to the point that the contacts no longer touch on the board.
Garmin no longer supports repair for this device as it has been discontinued. The repair is relatively easy if you are savvy with a soldering iron. If not, any local electronics repair shop should be able to re solder the port for you relatively quickly. Here is a quick guide on how to break down the unit to get to the port: https://www.ifixit.com/Guide/Garmin+Nuvi+1490T+USB+Port+Replacement/59770
I realize this doesn't provide a quick fix for your device but I am afraid it is physically damaged internally and will need a physical repair to keep it going. If you have any additional questions or concerns about the answer I provided, please let me know. Thank you.