When the computer screen does not light up, you can follow the following steps to troubleshoot and solve it: 1. Check the power connection
1. Ensure power on: Check if the computer host and monitor are correctly powered on, and if the power cord is securely plugged into the socket and device's power interface.
2. Check monitor power: Try pressing the power button on the monitor to see if there is any response, such as indicator lights on or any information displayed on the screen. If the monitor does not respond at all, it may be a problem with the monitor itself or a damaged power cord. 2、 Check the video connection cable
1. Check if the connection cable is properly plugged in: Check if the video cable (such as HDMI, VGA, or DP cable) connecting the computer host and monitor is properly plugged in and undamaged.
2. Try unplugging: If the video cable is connected properly but the screen still doesn't light up, try unplugging the video cable again to ensure that both ends are securely connected. 3、 Check monitor settings
1. Check the input source of the monitor: If using an external monitor, ensure that the monitor is turned on and the correct input source is selected.
2. Adjust monitor settings: If the monitor has menu settings, check if there are any settings that may cause the screen to not light up, such as low brightness settings or incorrect display modes. 4、 Check the computer host
1. Check the startup status of the host: Observe the indicator lights on the host or listen to the sound of the fan inside the host to determine if the host has started normally.
2. Check hardware connection: If the host does not start, it may be a power failure or hardware issue. At this point, it is necessary to check whether the power cord, memory module, graphics card, and other hardware are securely plugged in and ensure that they are not loose or damaged. 5、 Attempt to enter safe mode
1. Press the F8 key when turning on: If the host has started but the screen still doesn't light up, you can try pressing the F8 key when turning on (which may vary for different computers) to enter safe mode.
2. Check the system or driver: If you can see the screen display in safe mode, it may be a problem with the system or driver. You can try updating or restoring the system, or uninstalling recently installed drivers. 6、 Use system repair tools
1. Startup repair: If the system cannot enter normal mode, you can use a Windows installation disk or USB drive to start the computer, select the "Repair Computer" option, and perform startup repair.
2. System file check: In safe mode, you can use the command prompt to run the 'sfc/scannow' command to check and repair system files. 7、 Seeking professional assistance
If the problem still cannot be solved after the above steps, it is recommended to contact professional technical support or repair services. Technicians can provide more in-depth diagnostic and repair services. preventive measure
1. Regularly update the system: Install operating system updates and patches regularly to fix known issues and vulnerabilities.
2. Backup important data: Regularly backup the system and important data to prevent rapid recovery in case of unexpected issues.
3. Keep hardware clean: Clean the dust inside the computer, ensure proper heat dissipation, and avoid hardware overheating that may cause malfunctions.
By following the above steps and preventive measures, most computer screen issues can be resolved or avoided.