[HELP]Black – White PC monitor

Well, i went to my pc, it was still on, and the screen was black white only
i turned it of and put it on again and it had colors again
few minutes later again black – white only
here’s my pc – I updated video drivers 1 week ago so that’s not the problem
Dell XPS 420
Intel core 2 Quad CPU Q6600 @ 2.4GHz 4GB Ram
32bit
NVidia Gforce (i dont know wich one but a new one)
Answer #1
Check the cable between your monitor and your computer at both ends…
Answer #2
nothing wrong there…
Answer #3
Try a different cable if you can get hold of one…