Try to remove the battery and insert it back into your gps device and turn it on. If the screen does not still work, then you need to reset the nuvi, by holding down the power button for about 15 seconds, then the unit will restart, that way the touch screen should respond. If it still does not work, then you need to calibrate the screen to get it to work. To calibrate the screen, follow the sreps below:
It might not work trying it once, so you have to try it over time till it works. Calibration is the last resort of all solutions, so if calibrating it does not do the work, then it means it a an internal problem.
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