What is the reason for the car's display screen not lighting up?
3 Answers
The reasons for the car's display screen not lighting up are: 1. The power supply to the display screen is abnormal, and the power supply module should be replaced; 2. Poor contact of the cable, the cable should be replaced; 3. Check whether the display screen is damaged. The uses of the car display screen include: visible reversing image, watching DVD, navigation, etc. The car's display screen is located in the middle of the driver's seat and the front passenger seat, making it convenient for both the driver and front passenger to use. It no longer uses traditional physical operation designs such as buttons and knobs, but adopts capacitive touch technology like a mobile phone screen, allowing the owner to operate it more conveniently and quickly with a light touch, press, or swipe.
That day I was driving and suddenly found the dashboard screen went black, which really gave me a scare. This kind of situation is mostly caused by electrical circuit issues, and needs to be checked step by step from simple to complex. First, check the fuse box for any blown fuses, especially those labeled for the multimedia system. If the fuses are fine, then inspect whether the display connector is loose – my friend’s car once had a connector come loose due to rough roads. Next, consider whether the screen itself is broken or the main unit has malfunctioned, such as unstable voltage burning out capacitors or software crashes. Incorrect wiring during aftermarket navigation installation can also cause a black screen. It’s best not to disassemble it yourself; instead, take it to a professional auto repair shop to read the fault codes with a diagnostic tool. The power cycle trick also works – disconnect the negative battery terminal, wait five minutes, and try again.
Last time I encountered a display failure was after starting the vehicle under scorching summer sun. This is usually related to excessive temperature, as LCD screens are prone to malfunction under extreme heat. You can first touch the screen area to see if it's burning hot - if so, turn off the engine to cool down before retrying. Also pay attention to battery condition: electronic devices may malfunction when voltage drops below 11 volts, which can be checked by measuring voltage at battery terminals with a multimeter. Wiring issues shouldn't be overlooked either, especially in older vehicles where aged wiring or rodent-chewed short circuits frequently occur. Avoid placing liquids near the screen during daily use - spilled soda seeping into gaps can fry circuit boards. The most worry-free solution is still to get a comprehensive check at the 4S shop, where they have OEM diagnostic equipment to accurately pinpoint problematic modules.
