video playback problems

whenever i play a video file it plays with a red tinge to it, it looks like terminator vision, all red and no colour. i haven’t installed any software or played with any video settings. it doesn’t matter what type of file is being played, wmv, avi, mpg, they all do it. it happens using windows media player, windvd, winamp. any suggestions to fix this would be appreciated. cheers.