What Causes No Network Signal on the Car Screen?

[OKyle]

If the car navigation system indicates no network connection, the following reasons may be the cause: 1. The navigation device does not have WiFi functionality. If it does, check whether the account is matched. 2. Network connection error—verify if the network exists. 3. Poor network signal in the current location. 4. Offline maps and navigation information have not been downloaded. If none of the above solutions work, consult the merchant's customer service for further assistance. Below is an introduction to car navigation systems: 1. Components: A car GPS navigation system consists of two parts. One part includes the GPS receiver and display device installed in the car, while the other part is the computer control center. These two parts communicate via positioning satellites. 2. Working Principle: In GPS observation, the distance from the satellite to the receiver can be obtained. Using the distance formula in three-dimensional coordinates, three satellites can form three equations to determine the observer's location. Considering the clock error between the satellite and the receiver, there are actually four unknowns—X, Y, Z, and clock difference—requiring the introduction of a fourth satellite to form four equations for solving, thereby obtaining the observer's latitude, longitude, and elevation.