Garmin NUVI 1490TV Owner's Manual page 66

Appendix
Problem/Question
My battery gauge
does not seem
accurate.
The touchscreen is
not responding to my
touches.
How do I know my
nüvi is in USB mass
storage mode?
My computer never
senses that the nüvi
is connected.
4
Solution/Answer
Allow the unit to fully discharge, and fully charge it
(without interrupting the charge cycle).
Calibrate the touchscreen as described on
When your nüvi is in USB mass storage mode, a
picture of a nüvi connected to a computer is shown.
Also, you should see two new removable disk drives
listed in My Computer.
1. Unplug the USB cable from your computer.
2. Turn off the nüvi.
3. Plug the USB cable into a USB port on
your computer and into your nüvi. The nüvi
automatically turns on and goes into USB
mass storage mode. Ensure that your nüvi is
connected to a USB port and not a USB hub.
page 55.
nüvi 1490TV Owner's Manual