What causes the car display screen to go black?

[DiHannah]

The reasons for the car display screen going black are as follows: 1. Power voltage issue: Check the stability of the car's power voltage and eliminate any voltage instability. 2. Display cable malfunction: If there is a problem, simply replace the display cable with a new one. 3. No image but sound: This indicates a loose power connector for the navigation display. Information about displays is as follows: 1. Display: A display tool that projects certain electronic files onto a screen via specific transmission devices and reflects them to the human eye. 2. Classification: Based on manufacturing materials, displays can be categorized into Cathode Ray Tube (CRT) displays, Plasma Display Panel (PDP), Liquid Crystal Display (LCD), etc.

[OIsabel]

I just experienced this situation! Last week while driving, the screen suddenly went completely black, which scared me so much I almost pulled over. After thinking about it carefully, there could be several reasons: the head unit froze like a stuck phone—just hold down the power button to restart it; the wiring harness connected to the screen might be loose or damp—especially common after heavy rain; a blown fuse—check the manual for the fuse box location; the worst-case scenario is the screen itself being damaged, though that’s less likely. In my case, turning off the car for half an hour and restarting it fixed the issue. I suggest you try a cold reboot—it’ll likely resolve simple glitches.

[DiLondyn]

From an engineering perspective, black screens can be categorized into software and hardware issues. On the software side, failed OTA updates or system conflicts may cause black screens, similar to a computer's blue screen. For hardware, focus on three key checks: 1) Power end - inspect the corresponding 15A mini fuse in the fuse box, replace it with a spare using needle-nose pliers if needed; 2) Signal end - ensure the video cable behind the head unit is securely connected; 3) Screen power supply - use a multimeter to verify 12V voltage. Last time my car had a black screen after modification, it turned out the video cable was pinched - rerouting the wiring fixed it. If you know how to use a test pen, you can diagnose the issue in about ten minutes.

[AxelFitz]

Newbies, don't panic! I remember sweating bullets when my first car's screen went black, but the mechanic later said it's usually not a big deal. First, feel around the edges of the screen for slight vibrations—if present, it means the screen has power but isn't displaying. Try pressing physical buttons and listen for feedback sounds to check if the head unit is alive. Turn off the engine, disconnect the negative battery terminal for five minutes to reset the system. Remove all external devices like cigarette lighter USB drives. Tested and proven by a female driver—last time my car charger short-circuited, causing a black screen, and unplugging it fixed the issue immediately.