We use cookies to provide you with a better experience. If you continue to use this site, we'll assume you're happy with this. Alternatively, click here to find out how to manage these cookies

hide cookie message
2,862 Tutorials

Monitor cable problem

When your display starts flickering

Our Helproom Editor helps out a reader who is having problems with his display.

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.

See all How to articles. Get free tech support in the Helproom Forum.

Visit Windows 7 Advisor for more Windows advice. Or email our Helproom Editor for bespoke advice.

Samsung T220 review

IDG UK Sites

Apple WWDC 2015 rumours: iOS 9, OS X 10.11, Apple TV & more

IDG UK Sites

Why I think the Apple Watch sucks and you'd be mad to buy it

IDG UK Sites

Kung Fury VFX behind-the-scenes: how Fido blew up everything for this year's most over-the-top film

IDG UK Sites

What will Apple launch at WWDC 2015, with one week to go? Apple TV, Macs, Beats Music, iOS 9, OS X 1......