Odd red pixels appear all over screen

When attempting to boot Ubuntu/Xubuntu/etc from a LiveCD, my screen displays "color scrambled" random pixels for a few seconds after the loading screen with the 5 dots, and then turns completely black with a few scattered red pixels. The OS continues to load and operate, but the red pixels continue to be displayed. They occasionally move around and flicker, a few trailing the mouse, but never dissipate. At first I thought it was just a quirk with booting from the CD, but after installing it alongside Windows 7 it still always boots with these red pixels. I've never had this occur before on Windows 7, so I'm sort of at a loss on what the issue is. Any advice on fixing the problem or providing more info would be much appreciated.