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Windows 7: Video card interferences on screen

07 Jan 2013   #1

Windows 7 Ultimate 64-bit SP1
Video card interferences on screen

My video card shows some EMI or EMI-like interference, faint diagonal wobbling lines on screen in VGA output (my new monitor is VGA). The monitor and cable are fine as they do not appear in the onboard one and my laptop's VGA output, and they appear on other monitors/cables as well. It's definitely the video card VGA output or some interference inside the computer.

The lines are in the BIOS too. They are more noticeable on darker colors. They do not appear on screenshots.

Is there a way to fix this or I have to buy a new video card? Thanks

My System SpecsSystem Spec

07 Jan 2013   #2

Win7 Home Premium x64 SP1

Hi Derek
Some kind of picture would be really good. I know you said that the artifacts/interference's don't show in screenshots but do they show up if you take a picture with a camera or phone?
How are you connecting the cable? By this i mean are you using any type of adapter( DVI to VGA) or are you connecting a standard VGA cable from GPU to monitor?
Do you have a friend that has another monitor you could try? Preferably one that connects via the DVI/ HDIM or DP outputs..
My System SpecsSystem Spec
07 Jan 2013   #3

Windows 7 Ultimate 64-bit SP1

Hi Ganjiry many thanks.

Unfortunately my phone camera can't pick up them at all, they are wobbling fast and faint.
Here a image, not mine, that shows a similar issue, but in my case the lines are tilted downwards, way less noticeable, more thinner, and moving fast.

I have a direct VGA cable my video card has a VGA port besides DVI and HDMI.

I've tried two monitors and cables and the same issue appears on them, On the other hand the onboard GFX which is VGA is fine on all monitors as well as the VGA output from my laptop. The lines don't appear over DVI, but my own monitor doesn't have it.
My System SpecsSystem Spec

07 Jan 2013   #4

Windows 7 Ultimate 64-bit SP1

Also, don't know if related or not but my video card doesn't turn off the monitor when I shut off the computer or when Windows put it to sleep mode. The message check cable signal appears indefinitely on it and have to shut it down manually. Again, with the onboard card and same cable, the monitor sleeps fine.
My System SpecsSystem Spec
07 Jan 2013   #5

Win7 Home Premium x64 SP1

Ello chap.
Looking at the pic i would have said it could have been driver issue's but if the lines don't appear when using a dvi monitor i don't think it is. It's more than likely just a problem with that output.
I've had a look through the specs of your graphic card and the dvi connection is able to send an anologue(VGA) signal. So for testing purpose's you could get a DVI to VGA cable 3 m Video cable 15 pin HD D-Sub (HD-15) - male - 17 pin analogue DVI - male and try your VGA monitor in the DVI output. It's better to buy a cable rather than a DVI to VGA adapter as the adapters can be unreliable.
I will do some googling and see what i can come up with regarding the possible failure of the VGA output. (Not saying that is the problem though)

Edit: Have you recently updated your gaphic cards driver's at all?

My System SpecsSystem Spec
29 Jan 2013   #6

Windows 7 Ultimate 64-bit SP1

Sorry for the late reply (delayed to get the adapter)

Finally it solved the issue, seemed to be a bad port on my video card.
My System SpecsSystem Spec

 Video card interferences on screen

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