A technician installs a new graphics card that supports high resolutions. The technician sets the resolution to the highest setting and then the monitor displays no video. The technician hits the…

Reseating the card in a different slot does not change the resolution setting stored in the OS, so no video would still appear after the OS loads.

Updating the graphics driver requires internet access and OS visibility, neither of which is available when the screen is blank after boot.

Reinstalling the operating system is a destructive last resort and is entirely unnecessary when the problem is simply an incorrect display resolution setting.

Booting into Safe Mode bypasses the custom graphics driver and forces a basic 640x480 or 800x600 VGA display mode that the monitor can render, restoring visibility. The technician can then navigate to Display Settings and set a resolution supported by both the monitor and graphics card before rebooting normally.