Garmin Nuvi 250 stuck in mass storage mode when car charger is plugged in. It seems to think that my car charger is the cpu and not a charging device only. Please help, this is extremely annoying

Hello,

The nuvi is being put into mass storage mode (the mode used to transfer data back and forth to a computer). This is usually caused by using the wrong vehicle power cable.
The correct cable is Garmin part number 010-10723-06.
http://www.gpscity.com/garmin-mini-usb-12v-cigarette-lighter-adapter-for-nuvi.html

1) Disconnecting the nuvi from the charging cable.

2) Press and hold the battery meter icon for 8 seconds. This puts the nuvi into "system test" mode.

3) Plug in the power cable.

4) Click "Exit." The nuvi should now reboot, but remain in GPS mode!

When you plug it into your computer the satnav is meant to go into the mass storage mode. It should charge but it charges at only half the speed it would with a charger (i.e. it takes approx 8 hours to charge.)

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.

The issue is with your car charger. Replace the charging cord and your problem should be resolved. It is also the cheapest thing to do.
Second, if your Garmin GPS is relatively new, and still under warranty, you may contact Garmin Customer support and they will replace it for you.

It has gone into "Mass Storage Mode" because it thinks it is connected to a computer. Are you using something other than the Garmin power cord such as a cell phone charger?

Check this out:
http://www.sharc.net/gps_charger_repair.htm

Steps:
1) Disconnect the nuvi from the charging cable.
2) Press and hold the battery meter icon for 8 seconds. This puts the nuvi into "system test" mode.
3) Plug in the power cable.
4) Click "Exit." The nuvi will reboot, but remain in GPS mode!

Is this this charger the original Garmin charger?
Is the device loading?

Hi,

Try a new battery, they are known to fail in these devices,

http://www.batteryship.com/htmlos/htmlos.cgi/22379.4.126974959654303683

Easy swap, few screws.
Hope this helps
Regards