Garnub Nuvi 500 power source

I would suggest that you contact Garmin and try to reload the operating system.

If you are using a standard Garmin car charger, you can connect the charger to a DC power source that can provide between +10VDC to +30VDC. The charger produces +5VDC to power the Nuvi. This can be verified on the charger label.
You can NOT connect any voltage higher than +5VDC directly to the Nuvi.

Try to charge your nuvi properly and full, or for at least 2hours before registering it. If the source of power connected to your nuvi is not strong enough, the nuvi might go off during an operation. Secure that the battery is well charged, then the source supplying the power is good enough to supply your nuvi with power before starting an operation.
Hope this helps.

There is a fuse in the car charger adapter silver tip.... Unscrew it CAEFULLY its spring loaded and check fuse

The problem is with the socket at the back of the satnav where you plug in the mini USB plug of the power cord. As the socket wears it feels as if the plug is in fully when it's not. Push the plug in further and the problem should be solved.

I think Garmin has a great solution for you and not only because it has a large screen but also for the fact that you can connect a reversing camera to it. It's the Garmin nuvi 5000. Keep in mind though that the unit does not have a internal battery, which means that it has to be connected to a 12 volt power source in order to operate. You cannot walk around with it and navigate on foot, but I think it would be perfect for you. Check it out on the Web.

Your nuvi 5000 does NOT have a internal battery and that means that you cannot operate it unless it is connected to a 12 volt power source. Connecting it to your computer via USB allows you to install map updates, check for firmware updates, etc, but you will not be able to use it as a gps while it is connected to the computer. There is nothing wrong with your gps.
To use your gps in the home you need to purchase a 12 volt adapter, there are several types, plug the adapter into your wall outlet and connect your gps to it. If you can sit near a window it will help in picking up the satellite signal. Just keep in mind that you cannot connect the 12 volt power supply and use the usb cable at the same time. Enjoy your gps.

Your Garmin nuvi 5000 will never charge because it has NO internal battery. The only time it will operate is when it is plugged into a 12 volt power source. I have one and it really doesn't bother me at all. I bought a second cradle and a 12 volt adapter for use in the home.

I had the same problem so i went to the local best buy store and I found out that the Garmin 5000 doesn't have a built in baterry pack therefore it must be plugged into an external power source, such as the car jack or wall ac in order to use it. I exchanged my 5000 for the Garmin 880 which i find much better. Hope this helps...