Note my name, I really hardly know one button from another on these infernal machines but I have to try something to fix a very annoying very recent problem. Since some sort of MS download (no idea which one) my screen goes black & can't always be brought back by plugging and unplugging. Now, even when I log on it is black. Sometimes I can get it back, but if I leave the pc for too long off it goes again not to be retrieved at all. The monitor is happy & healthy when i do get it back so what is happening and how do I fix it?