QUESTION I've been experiencing problems with my Samsung T220 display in analogue mode. The image is wavy at the borders and flickering. My son advised me to use a DVI cable, but when I plug it in I just see my desktop background, with no Windows icons or mouse cursor. The display still flickers – might it be on the way out?
HELPROOM ANSWER From your description, it sounds as though you've connected the DVI-D cable at the same time as the VGA cable. This will result in the PC detecting a single monitor as two displays. The desktop you're seeing without your icons is what would be displayed on the second monitor in a dual-screen setup.
Try booting the PC with only the DVI-D cable connected. It's likely that the DVI-D connection will give you a better-quality picture than VGA.
However, the flickering does indeed suggest a problem with the monitor, and you may need to replace it.
Alternatively, it could be a problem with your graphics card, but you would typically notice graphical corruption as well as flickering.