Car dvd navigation machine touch screen not how to do?
First of all, it is recommended that you put the main interface of a map or the rear of the fuselage wiring diagram to facilitate the guidance of how to correct the touch screen, if the slow response to the navigation card pull down try other interface.
To see what brand, if it is a small problem to change a screen saver, if it is a big problem to repair point repair
Is slow response or point screen is not allowed it, if it is slow response will not be installed in the navigation and more things are not allowed to be calibrated