Fix the video card error does not work

Also known as display adapter, graphics card, video adapter, video board or video controller, video card is an external device connected to the computer's motherboard. It is used to create an image on the screen. Without a video card, you won't be able to see this article on your computer. To be clear, this is a piece of hardware inside the computer with the role of image and video processing, along with some tasks that are usually handled by the CPU. Video cards are used by gamers instead of integrated graphics cards because of their better processing power and video RAM.

Overview of computer video card

Below are the visual examples of video cards inside the computer. First, is an image of AGP video card. It helps the reader have an overview of the previous video card, with various types of connections and other components on the card. Next is an example of a modern PCI Express video card, commonly used in today's gaming computers.

Note : Some motherboards can also use on-board video cards, which means the video card is not a separate expansion card as shown below:

Video card ports

The images above also help illustrate the types of ports used for video cards. For more information on any of these ports, click on the links below.

1. DVI: (Digital Visual Interface stands) DVI is a video display interface. It was developed to become an industry standard to transmit digital video content, display devices at high resolutions up to 2560 x 1600. Common devices that use DVI connectivity are monitors. computer and projector. DVI can even be used with some TVs, although HDMI is more popular because only some DVI cables can transmit audio signals. The DVI connector (shown below) may have one of three names depending on the supported signal: DVI-A (analog only), DVI-D (digital only) or DVI-I (both digital and analog).

1. HDMI: (stands for High Definition Multimedia Interface) HDMI is a connector and cable capable of transmitting quality audio and video streams and high bandwidth between devices. HDMI technology is used with devices such as HDTV, projector, DVD player or Blu-ray player.

1. S-Video: S-Video, also known as Y / C video, stands for Super Video. This is the video transmission format and the connection type found on the video device. It uses a circular connection interface, and a separate luminance (Y) and chrominance (C) video signal transmission cable. When plugged into a TV or other display device, it creates a better image when compared to composite video.

1. VGA: (Short for Video Graphics Adapter or Video Graphics Array). VGA is a popular display standard developed and introduced by IBM in 1987. VGA provides a 640 x 480 color screen with 60Hz refresh rate and 16 colors displayed at the same time. If the resolution is lowered to 320 x 200, there will be 256 colors displayed. VGA uses analog signals, which means it only has the ability to display lower quality resolutions on the screen.

In the past, VGA or SVGA was the most common connection used for computer monitors. Today, most flat screens use DVI or HDMI connections.

Video card expansion slot (connection)

The video card expansion slot is where the card connects to the motherboard. In the image above, the video card is inserted into the AGP expansion slot on the computer's motherboard. Along with the development of computers, there have been several types of expansion slots used for video cards. Today, the most popular expansion slot for video cards is PCIe. Older slots are AGP, PCI and ISA respectively.

Note : Some OEM computers and motherboards may have onboard video cards or built-in motherboards.

Can I install multiple video cards?

Of course possible. Both AMD Radeon cards (using Crossfire) and NVIDIA GeForce (using SLI) are capable of running two or more video cards at the same time.

What to do when the video card is not working?

Note : This guide is for troubleshooting video cards that do not work. In addition to the instructions in this article, you should also review the article: Summary of several ways to fix black Windows 10 screen error for more information.

Caution : Most steps will require you to open and operate inside your computer. Therefore, make sure you know the potential risk of ESD (Electrostatic discharge / discharge phenomenon).

Update the driver

The first and most important thing is that you have the latest driver for the video card. Both NVIDIA and AMD provide free drivers on their respective websites. Download and install the latest drivers for your video card.

1. How to update the driver for NVIDIA video card
2. 2 simple ways to update VGA driver for computer monitor, laptop

Reattach the video card

Make sure your computer is turned off. Then, remove the screws that hold the video card, then gently shake it until it pops out of the expansion slot. After that, reattach the video card and turn on your computer.

Try changing the video card

If resetting the video card doesn't solve the problem, or your GPU is on board, try an alternative video card in your computer (if you have one).

Buy another video card

If the replacement video card does not work or you do not have a replacement video card, you should buy a new video card to replace the faulty card in the computer.

Replace the motherboard

If the replacement video card does not work and the replacement of the new video card does not solve the problem, it is likely that your motherboard is faulty and needs replacement. If you feel you need to replace the motherboard, see the article: Things to know when choosing to buy the mainboard of Quantum for more details. If not, you should bring it to a reputable repair shop for assistance.

See more:

1. How to fix the NVIDIA graphics card error is not displayed in Device Manager
2. Why is the computer screen suddenly turned off?
3. Troubleshoot problems of monitors and video cards