There are a few different possibilities that could be causing your computer to not respond when trying to utilize its graphics card.
First and foremost, it is important to assume the problem lays within the hardware or software of the computer system. It is possible that the graphics card itself is faulty and needs to be replaced. This could be due to the card either being damaged during installation, or simply wearing out over time as new components are added. The power to the graphics card may also need to be checked, as inadequate voltage would prevent the card from functioning correctly. Improperly seated hardware could also be an issue, as the graphics card must be seated properly in order for it to be recognized by the computer system.
It is also possible that the software on the computer is preventing the graphics card from working correctly. If there are outdated drivers or out of date operating systems installed on the computer, they may not be compatible with the graphics card. It is important to ensure that the correct drivers and updates are always installed on the computer to ensure compatibility with all hardware. Additionally, if the computer has a dedicated graphics card, it may not be enabled in the BIOS or UEFI settings.
Overall, if your computer is not responding properly when attempting to use the graphics card, it is likely due to a combination of hardware and software problems. If you suspect that the graphics card is damaged or malfunctioning, it is best to replace it so that the computer can function properly. Additionally, it is important to make sure that all of the necessary drivers and updates are installed on the computer, as well as ensure that the dedicated graphics card is enabled in the BIOS or UEFI settings.