Hi, thank you for contacting JustAnswer.com. My name is Russell. I will do my best to provide the right answer to your question.
I'm sorry to hear about the device's failure.
When connecting it to the computer, try different USB ports on the computer.
Also try removing the battery altogether, and leaving the device to reset for at least overnight.
Let me know whether either of these approaches work at all, in fixing the problem. Also let me know (using Reply To Expert) how old the Nuvi device in question is, please. Thanks.
If the Nuvi is *less* than 12 months from original purchase date, do *not* unscrew the back nor remove the battery. Reporting it at once to Garmin Australia as defective (or taking it to a nearby Garmin repair center to your location in Australia, before 1 year is out from its purchase), will get you warranty repair for free for your defective Garmin.
If it is more than 12 months (over 1 year, and thus, the warranty expired), there's no harm in removing the back or the screws.
This is a vital point. Please tell me which is the fact of the case, and I will advise you in more detail.
That is unfortunate.
Then you may as well remove the screws and locate the battery (likely to be square with two wires coming off it, a red and a black wire, both wires going to a plug.)
Pull the plug, to detach it from the device. That's all you have to do, no need to take out the battery itself, just to pull its connections.
Leave it like that, as I said, at least 6 hours or overnight, before trying it again.
Let me know how things turn out with the Nuvi, Raye. Thanks.