Registering my NUVI 2639LMT - GPS

Download and install Garmin Express to your PC. Plug your GPS in to you PC. Garmin Express will identify it and allow you to register and update it.

Try a soft reset:

To reset the Garmin device, turn off the device by pressing the power button on the top of the device. When the unit is off, press your finger to the bottom right corner of the screen and continue holding while pressing the power button. A prompt will appear on the screen confirming data reset. Click Yes.

If that doesn't work, try a factory reset:

https://www.youtube.com/watch?v=D_-zumajbaA

After registering the garmin nuvi, you will be able to download free maps. Depending on the type of map you want to download. Registration is free and garmin nuvi do not charge you for any map you update. Update is absolutely free.

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.

Details on registering and updating your garmin nuvi satnav are at http://www.fixya.com/support/r5628920-update_garmin_satnav_maps

why am i having problem registering gramin 265 wt when enter the number it says its invaild?? whats with that is there something in java applets that needs changing

By registering it with GArmin.com

When registrating your GPS on myGarmin you should type in your serial number. It's on a tiny label on the back/bottom of the unit, and is the identification number needed to start the registrating process. Your GPS will need to be connected to the PC on the next step.

www.garmin.com

Can anyone help me in registering garmin nuvi 255W? Also, once I connected the USB, I keep getting "External Power Lost". Is this always the case as the USB is connected?