When the computer screen shows no signal and a black screen appears, it usually means that the computer host failed to successfully transmit the image signal to the monitor. Here are some possible solutions: 1. Check the connection
Monitor Connection Cable: Ensure that the connection cables (such as HDMI, VGA, DisplayPort, etc.) between the monitor and the computer are securely plugged in and not loose. If possible, try replacing the connection cable or using another interface.
Power cord and monitor switch: Check if the power cord of the monitor is plugged in properly and if the monitor is turned on. 2. Check display settings
Signal source selection: Some displays have multiple input sources (such as HDMI1, HDMI2, etc.), ensure that the correct signal source is selected.
Display settings: Go to the settings menu of the display, check for any abnormal settings, and try to restore the default settings. 3. Check the computer host
Graphics card: If using a discrete graphics card, try unplugging and reinserting it to ensure it is not loose. At the same time, check if the driver program for the graphics card is installed correctly, and try updating or reinstalling the driver program.
Memory module: Loose or faulty memory modules may also cause this issue. Try unplugging the memory module, wiping the gold finger with an eraser, and then reinserting it.
Power supply: Check if the power supply of the computer host is working properly. If there is a problem with the power supply, it needs to be replaced. 4. Restart the computer
Sometimes, a simple restart can solve many problems. Try pressing the restart button or long pressing the power button on the computer to shut down and then restart. 5. Check other hardware
If none of the above steps can solve the problem, it may be due to other hardware failures, such as hard drives, CPUs, etc. At this point, you can try connecting the computer to another monitor or using another computer host to connect to the current monitor to determine the problem. 6. Seeking professional assistance
If none of the above methods can solve the problem, it may be a complex hardware malfunction. At this point, it is recommended to contact the after-sales service of the computer brand or a professional computer repair shop for inspection and repair. matters needing attention
Before performing any hardware operation, be sure to disconnect the power supply to avoid electric shock or damage to hardware devices.
If you are not familiar with computer hardware operation, it is recommended to seek professional help.
By following the above steps, you should be able to solve the problem of the computer screen displaying a black screen without signal. If the problem persists, more detailed examination and diagnosis may be required.