My SL350D Screen is frozen - I can see GPS/Music/Photo/Music but the screen won't respond to my taps

Your touch screen has moved - it needs recallibration. But first you have to get into it.

SOLUTION:

1. Hold down the MENU button on top of the unit for a few seconds until the screen goes white with a black   +    in the middle of the screen. 
2. Press down on the   +     and it will jump to the top LH corner. 

    3.   Press again, and keep pressing - it will keep jumping (we call it 'squashing the ants' because it pretty much describes what you are doing). 

Once it's been round through each of the four corners, 'OK' will come up on the screen. 

     4. Tap 'OK' - and you're back to the Application Screen with the Magnifying Glass icon.  

     5. Use the Back Arrow (top LH corner) to return to the main menu.

     6. Tap 'GPS' to go into Logic Gear Navigation

NOTE: you may need to reset the path to your maps after a screen recallibration

To reset: 

1. tap SETTING / APPLICATION / Magnifying Glass icon/  
2. double-tap NANDflash folder / logicgearnavigation folder / logicgearnavigation.exe file  to open them
3. return to the front menu and enter GPS