What is the reason for the navigation screen going black but still having sound?

[RyleeRose]

The reasons for the navigation screen going black but still having sound are: 1. The power plug of the navigation display is loose; 2. The touch screen is damaged. If the touch screen is functioning normally, then check the internal display screen for issues, inspect the touch circuit, and confirm whether there are any problems with the wiring. If no issues are found, consider whether the decoding chip or core module is not working or is damaged. Car navigation systems feature GPS global satellite positioning functionality, allowing drivers to input their destination into the system. The system will then automatically calculate the optimal route based on electronic maps and provide prompts (such as before turns) to guide the driver along the calculated route. The car GPS navigation system consists of two parts: one part includes the GPS receiver and display device installed in the car; the other part is the computer control center. These two parts communicate via positioning satellites.