Question about Garmin nuvi 750 GPS Receiver

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Nuvi 750 battery will not hold a charge. Unit works fine if plugged into the auto power. What might the problem be? What is the estimated cost of repair.

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Sounds like you just have a dead/bad battery.

You can check to see if your device was included in a recent battery-related recall here:
https://my.garmin.com/rma/recallLanding.faces

If your unit is not included in the recall and you are (or a friend is) handy, you can buy a replacement on the net and replace it yourself for around $25 (US Dollars):
http://vimeo.com/8387716
(There are other sources for the battery, I do know if the linked company is trustworthy.)

I'm not sure what Garmin charges for this type of service?

Posted on Oct 25, 2010

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I found that holding the power button for 10-15 seconds forced the unit to reboot, and it started just fine after that.
Since then, I've had an even more irritating issue, where holding the power button for 10-15 seconds would restart the unit, but it would freeze at the "loading maps." part. I ended up plugging the unit into my PC, which started it for purposes of data transfer. I then disconnected it from the PC and it restarted properly.
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Plug the charger into the mini-usb jack. The unit should turn on and when you come to the main menu, you should see a lightning bolt over the battery bar graph. This indicates that it is charging. If you don't plan on using it and want to charge it over night, if your Nuvi has a push down power switch on the top, press and hold it briefly until it goes to a black screen and says charging. If your Nuvi has a slide switch, slide it to the left until you get the same charging screen. A few seconds later, the screen will go dark but if you touch the screen, it will light up again and say its charging and go dark again. After several hours, when you go to touch the screen it will say Charging Complete". Yiu will also notice then when you go to use it, you will see ALL of the green bars on the battery bar graph will be lit.

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Sounds like you both have a battery problem. I experienced a similar problem when trying to charge via the USB-cable connected to my computer.
Ended up buying an original charger (expensive) and the charging went smooth.
The car charger should in any case work fine, so probably your battery is not very healthy.

Try holding your finger on the battery symbol for about 10 sec. The unit will then switch to a technical page. There you can observe the battery and charging voltage. When I plug in my computer USB-cable, I read around 4,4V and that is not sufficient for charging my battery.
When connected to the original charger, this voltage rises to about 5V which gives a nice charge. When unplugging charger, the unit displays the battery capacity. If the charging voltage is OK, but battery capacity drops quickly after you unplug charger cable, the battery is probably bad. (Of course you have to charge is for some time) I think around 4V battery voltage give 100% capacity. 3,9V gives about 90% capacity.
This will not solve your problem, but can give you an idea about what is wrong.
Good luck.

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Hold the off button (to the left) for 10 seconds... the system will restart and your garmin should work fine!

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