The Magellan RoadMate 5250T-LM is a portable GPS navigation device with a color touch screen. This five inch navigation system is easily identifiable by the model number listed on the back of the device.
Your screen may be covered by dirt or dust that is preventing it from reading your touch. Simply take a cloth and wash the screen. It could also be that you have a broken screen. You may need to replace the screen. Visit this link to see how to fix the screen.
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