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Re: how do i charge my garmin 750
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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The nuvi will accept a charge when connected to a computer if the computer connection is done through a powered USB port. Garmin part number 010-10723-00 which is an AC power adapter is also available for charging the unit. www.gpscity.com/garmin-nuvi-zumo-international-ac-adapter.html
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.
Went to Best Buy and they didn't know how to get the bar up either but said that the unit should be charged in 3 to 4 hours. So, when i unplugged the unit from the wall...the battery status showed up. I guess it doesn't show when the unit is plugged into the AC charger. Now, all is well.
I have a 100v A/C power / charger unit for my garmin C340 GPS that I use to charge my Garmin's battery every day. I can use thj adapter to run the GPS, or just turn it off and let it charge the GPS. But it connects dirctly to the Garmin GPS unit, not to the cradle like the Cigarrette lighter unit does. .