What's the reason for a car display suddenly going black and not lighting up?

[Braylen]

Here are the reasons why a car display screen suddenly goes black: 1. Poor line contact: It is very likely due to poor line contact, so it is necessary to promptly check whether there is a loose connection in the lines. 2. Aging power signal: Of course, it could also be due to aging of the power signal line. Try replacing it with a new signal line. If the black screen issue is resolved, it indicates a problem with the power signal line. Additional information: The car display screen not only provides information such as navigation, rearview camera, and vehicle fuel consumption for viewing but also includes various multimedia entertainment systems for operation, offering convenience to passengers and enhancing the interior aesthetics. However, once the car display screen malfunctions, the inconvenience it brings to the driver will be obvious. Therefore, if there is a problem, it should be checked and repaired promptly.

[VonCatherine]

My car also had a black screen display issue last time. Don't panic yet—this is usually a wiring problem. Loose power plugs or oxidized connectors are most common, especially on bumpy roads where vibrations can loosen them. It could also be a blown fuse; you can usually find it in the fuse box under the steering wheel—check the manual to see which one controls the screen. Overheating can trigger automatic power-off protection for the screen, which often happens after parking in the sun during summer. Try turning off the engine for half an hour before restarting. If you've installed an aftermarket large screen or 360-degree camera, the chances of wiring conflicts are higher. Lastly, consider a fault in the main unit module—this requires a professional shop to read the error codes. For safety, if the screen goes black, pull over and restart the engine. If it doesn’t work after multiple attempts, don’t push it—call a tow truck for the safest solution.

[McMadelyn]

There are essentially three main reasons for a car display screen going black. First is hardware failure—if the backlight is broken, it's like a shattered phone screen with no display at all, and buttons won't respond when the main unit freezes. Second is power supply issues—the screen won't boot if the battery voltage drops below 11 volts, while a slipping alternator belt or corroded wiring can also cause insufficient power. Third is software crashes—sudden power loss during map updates may crash the system. From my experience, holding the power button for 10 seconds to force restart works 70% of the time. If rebooting fails, check the main unit connectors behind the glove compartment for burnt smells or water stains—these details can save significant repair costs.

[Josh]

A black screen on the display is actually quite similar in principle to a computer blue screen. Common triggers include overheating of the infotainment system, where blocked ventilation holes can activate a protection mechanism. Another cause is software conflicts, such as when the system resources are overwhelmed during Bluetooth connection with a phone, leading to a crash. Additionally, a failed memory battery can cause the car's computer to reset time settings after a power loss. A simple emergency fix is to disconnect the battery's negative terminal for five minutes and then reconnect it, which acts as a complete reset. If the screen lights up for a second and then turns off again after this operation, it's likely that the display's high-voltage strip is faulty, and replacing it costs around 300 yuan. Vehicles with modified reverse cameras are particularly prone to this issue.