|The colors are correct but just faded?|
Are you sure the drivers are loaded? Check display properties. If the resolution is at 640 x 480 you need to increase that. If you can't then likely you need the correct drivers installed. And/or you may need to increase the number of colors, also in display properties.
Otherwise the problem is with the monitor. The monitor's OSD usually will have some preset color configurations. You can try different ones to see if they're to your liking. You may need to adjust the contrast also.
Or maybe your monitor is dying and can't deliver the pizza anymore.