I put the on off switch to lock. Then I prayed and held the switch in the on position for 20 to 30 seconds. Presuming it might be a way of booting the system. Then I switched to off position. Waited couple sec and tried powering on position in Wola!! it came on!!
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Your coby is not charging anymore..The battery probably needs to be replaced with a new one..Please check your connection when you charge it..There should be an icon that shows your battery is charging. If it does so that means your coby is charging but your battery cant store the energy anymore.
I had the same problem with mine and got it working by doing the following while on the phone to Garmin. Plug your charger cord into the device and your computer (do not use a laptop, you need the higher current from a desktop for this). Hold the power button down for as long as it takes for the Garmin logo to display, this could be as much as 1 minute. As soon as the image shows on the screen, release the power button. If your Garmin isn't completely shot you will see it boot up. If you have the Garmin Web Updater program on your computer, run it and update the operating system software to insure you have the latest greatest from Garmin. Once that is done, update your XML data files - they'll be on the list of updates if you need them. Once those are done you can update any voice or language files you'd like. Lastly, leave your GPS plugged in at least an hour or two to give it a charge. Overnight would be better to insure your battery is really well powered up. At this point your Garmin should function normally. The Garmin tech I spoke with told me some units start acting funky when the battery runs down too low and if it's REALLY dead it won't even take a charge or power up when you hook up your charger cord. Try holding the power button for as long as it takes to get a spark & you should be on your way. If not, call Garmin's support number for your locale & they're do their best to get you back up & running again. Cheers, Jeff
Ifthe laptop battery is more than 3 - 4 years old then the battery could be wornout. Rechargeable batteries have a finite number of charge and discharge cyclesand will lose their charge capacity over time, i.e. won't charge to 100% andgradually the charge reduces until the battery won't charge up atall.
ORThe battery shows a 100% charge but when the adapter is disconnected thebattery drops off to zero capacity in a very short time.
Ifthe battery drops to an unacceptable charge level then the battery needs to bereplaced.
With a Nuvi, If a Garmin or Garmin compatible power cord is not used, GPS will stay on the USB Mass Storage mode and will not go to Map Screen even though connector fits fine. In this case GPS can slowly charge. So, you need to find/obtain a power supply that works right.
When you connect the 750 to a computer it goes into data mode and the screen shows only the connected to PC icon. Let it charge for a few hours and then disconnect it from your computer and it will come up in Navigation mode,
Had the same problem-try this- leave your nuvi off for about 4 hours. Push the power button to the right(lock position) and then to the left (power on position) and let go. I suspect temperature (getting overheated is the problem. This worked for me.