What should I do if the computer screen is black but the computer is on?

Solution: 1. If the resolution is wrong, you can plug in the computer power cord, turn on the desktop computer and wait until the light comes on, then press CTRL ALT F7 to restore the default resolution; 2. There is a problem with the VGA connection line. If there are problems such as wire breakage or damage, just change a VGA cable; 3. The graphics card fails, wipe the graphics card, and reinstall the graphics card; 4. Computer virus damage, hold down the CTRL key when starting the computer, or enter after booting Just press the F8 key before the Windows system starts up and enter safe mode to scan and kill viruses.

Reason 1: The resolution is wrong

One of the reasons why the monitor screen is black but the light is on: The resolution is wrong . Display resolution (screen resolution) refers to the precision of the screen image and how many pixels the monitor can display.

Solution: We plug in the computer power cord, turn on the desktop computer and wait until the light comes on, then press CTRL ALT F7 to restore the default resolution. Or change the resolution of the computer to solve the problem of black screen but bright light on the monitor.

　Cause 2: There is a problem with the VGA connector

　The VGA connector is the video transmission standard cable.

Solution: We carefully check whether there is any problem with the VGA connecting cable. If there are problems such as wire breakage or damage, just replace the VGA cable.

　Reason 3: Graphics card failure

The graphics card, also known as the display adapter, is one of the most basic configurations and most important accessories of the computer. It is used by the computer to convert digital-to-analog signals. Device responsible for outputting display graphics.

Solution: Reinstall the graphics card. We remove the baffle of the graphics card on the chassis, wipe the gold finger of the graphics card clean, align it with the long slot on the motherboard near the CPU and insert it with a little force, then plug in the external power cord of the graphics card, and connect the monitor to the output of the graphics card. interface, then connect the power to the host and turn it on. The system will prompt you to install a new hardware driver. Put the graphics card CD into the optical drive (if there is no optical drive, you may copy the driver CD files to a USB flash drive on another computer with an optical drive. You can use it again), select the driver path, and then go to the next step. After completion, restart the computer.

　Reason 4: Computer virus damage

Computer viruses are codes inserted by programmers into computer programs that damage computer functions or data. They are contagious, covert, and A set of computer instructions or program code that is infectious, latent, excitable, expressive or destructive, can affect computer use, and can replicate itself.

Solution: We hold down the CTRL key when starting the computer, or press the F8 key before entering the Windows system startup screen. Just enter safe mode and scan for viruses.

The above is the detailed content of What should I do if the computer screen is black but the computer is on?. For more information, please follow other related articles on the PHP Chinese website!