I have just purchased a brand new 22" monitor---when I set it up all looked well and my desktop was a riot of coloured icons. However, I was called out on an emergency and when I returned half an hour later my screen had gone white. I rebooted but still got white screen. I changed to an old monitor and everything was fine. My graphics card is a 4 year old STB nVIDIA TNT delivering 128 bit power with 16 MB.
Is the card the problem? or the monitor? Why did everything work initially?