Question about Garmin nuvi 765T GPS Receiver
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Posted on Jan 02, 2017
Unfortunately, there is not a lot of easy user troubleshooting for Garmin units. I will note that the AC adapter that plugs in the USB port will give the unit more power than a USB connection to a computer or the 12vDC car adapter. If you've tried connecting it to the AC adapter and it still won't come on, it is possible the internal battery has gone bad and is consuming more power than the supply can produce to both charge and power up the unit. You can try leaving it plugged into the AC adapter for an hour or so and then trying to power it up with the AC adapter plugged in.
Let me know what you've done so far to troubleshoot and I'll research some more for you.
Posted on Feb 24, 2010
Mine did the same thing. Take a T5 torx bit and unscrew the bottom two screws. Gently pry unit apart. I used finger nails. Disconnect the battery wires from circuit board. Leave unplugged for 10 seconds. Plug the battery wires back into the circuit board. Turn unit on and then plug into computer and run the garmin web updater. Download the fix from garmin. Or you can send back to garmin and two weeks later they'll send you a refurbed unit. You'll lose all your saved data. On top of paying the shipping.
Posted on Jul 07, 2009
Your Garmin is not charging then it is a loose contact or cold solder in charging socket. That is the common problem of socket you must re works the solder there or bring it to a cellphone repair if you are not electronically enclined. If re solder does not fix then problem is in the charging IC. Replaced this IC so it will charged again.
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Posted on Jul 08, 2009
I can't give you a source of the problem but I can give you at least a temporary solution. Turn the unit on without the cord attached. After it comes up, press on the battery button for 10 seconds until the diagnostic screen comes up. Plug the cord in and press Exit and the unit should work while it charges. You will not be able to use it with the computer using this method, however. To do that you need to plug it in while either without powering it on or after it is powered up normally.
Posted on Sep 02, 2009
I had the same problem. I called Garmin and the lady said if I had the software Map Source or something, that can do the trick, but the funny thing is you have to buy the software with Map Updates, or you get the software when you buy a new unit, and register the unit within 60 days of first satellite reception. Though I searched internet and someone said to copy a certain file/folder or I'd rather just copy the whole GPS folders and that might do the trick. You are right, this is a pain in the rear end.
Posted on Jan 13, 2010
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