**If want to navigate easily, can plug in a USB Mouse to navigate the on screen menus, without using touch screen.


Check 

Settings

System Vers/Info

Press and hold Information Box - Keypad will come up 7890 ok



System

Set Screen Origin to Positive

Set Touch Origin to Positive

Reset unit by either pressing the RST button with paper clip 

or turning car off (wait 10 seconds) then turn car on to see if settings have been set