What's the reason for a black screen with sound in the navigation system?

[StJayla]

The reasons for a black screen with sound in the navigation system: 1. System crash caused by unstable working voltage of the motherboard; 2. Damaged touch screen; 3. The decoding chip or core module is not working or damaged; 4. Loose power plug of the navigation display. The car navigation system has the GPS global satellite positioning system function. Once the destination is input into the car navigation system, the system will automatically calculate the route based on the electronic map and remind the driver to follow the calculated route during the vehicle's movement. The car GPS navigation system consists of two parts: one part is composed of the GPS receiver and display device installed in the car; the other part is composed of the computer control center, and the two parts are connected via positioning satellites.

[MirandaAnn]

I encountered a similar issue last time, and a black screen with sound in the navigation system is indeed frustrating. This usually indicates the system is still running, but there's a problem with the display. First, try restarting the system by holding the power button for more than 10 seconds. If that doesn't work, check if the screen ribbon cable is loose, especially since rough roads can cause issues. Additionally, software conflicts might lead to a black screen, such as after updating maps or installing third-party apps. Also, if the temperature is too high, the central control might activate a protection mechanism and turn off the screen automatically. Wait a few minutes for it to cool down and try again. If you can't find the cause, it's best to have the motherboard checked at a professional shop, as disassembling it yourself could cause more serious damage.

[VonLilliana]

I've investigated the issue of the navigation system having sound but a black screen several times. It's most likely a hardware failure, such as a broken screen itself or problems with the backlight module. It could also be that the display driver of the infotainment system has crashed, in which case a reboot usually helps. I've also found that some vehicle fault codes can cause the screen to automatically shut off, which can be detected by connecting a diagnostic computer. Additionally, unstable power supply voltage might be the culprit—use a multimeter to check the voltage at the screen's interface. If you've recently installed a dashcam or reversing camera, wiring interference could also cause the screen to go black. A simple solution is to try restoring the factory settings.

[GenesisLee]

Don't panic when encountering a black screen with sound in navigation, it's basically a display malfunction. First, rule out minor issues: check if the screen display function was accidentally turned off in the settings; see if the screen brightness was adjusted to the minimum; try other functions like the reversing camera to see if it can light up the screen. For hardware issues, focus on checking for poor contact in the wiring harness, which is particularly common. For software issues, it's recommended to disconnect the negative terminal of the battery for two minutes to reset the system. If the screen is really burnt out, you can only replace it with a new part. Nowadays, some aftermarket parts are of good quality and affordable.

[SanPaisley]

This situation is mostly caused by screen connection issues or system malfunctions. You can try holding down the volume and menu buttons simultaneously to force a system reboot. Pay attention to whether the brand logo appears during startup; if there's no display at all, it's likely a hardware issue. If this occurs just after washing the car or during rainy weather, be cautious of short circuits due to damp wiring. Additionally, abnormal power management modules can also result in sound without screen display. Older vehicles are particularly prone to capacitor aging; those with DIY skills can open the main unit to check for bulging capacitors. If you can't resolve it yourself, take it to a repair shop.