What are the reasons for the sudden blackout of the car display?

[DeVera]

There are three main reasons for the in-car display not lighting up, as detailed below: 1. Abnormal power supply: First, check whether the power supply to the display screen is normal. If the power supply is abnormal, replace the power supply module; 2. Poor contact of the cable: Check whether the cable connection is secure. If there is a problem, replace the cable; 3. Display screen damage: Check whether the display screen is damaged. Replace the display screen for testing. If it returns to normal, the display screen is damaged. If the issue persists, with normal power supply and good cable contact, check the video output signal of the motherboard and replace the motherboard for testing. Most cases of the display not lighting up are due to host issues. Additional information: Below are simple steps to address host issues: 1. Open the case, take a used brush (such as a toothbrush or dust brush), remove the memory and graphics card, and clean them carefully; 2. Wipe the gold fingers of the memory and graphics card with your fingers, remove the motherboard battery to discharge, then reinstall it; 3. If it still doesn't light up, observe the color of the display's indicator light. A yellow light indicates no signal, which can basically confirm a host issue, and you should take it to a repair shop for servicing.