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video Interference


dzzoom
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Hi hack5 I was told about you about 2 years ago. I have been looking at your site and hoping you can help me out or someone might now what is going on with my computer setup. I have 3 computer working is one in a way if you think about it. After seeing the video on how to use one keyboard and one mouse on more than one PC. I got wild. The 3 PCs are all new and high-end at the time. All 3 have q9600 and 8 GB ddr3 ram. One pc is running 5 LCDs. Yes that is 5 22”lcds. The other 2 PCs are 2 22” LCDs this way I can run any thing I want to and if one PC has to restart for something the other will stay running. Now I was in OKC OK and this set up was running for 1year before I moved. After moving to NYC I am getting some Interference on all 9 LCDs I was thing it might have been the AC power I got 5 UPS to run this all on. But that did not help. I call my power comp and had my house look at. I was told it was form something close to me. Does anyone know of a good DVI cable to use or have some tip to help me out? I do not know how to post a pic to show you my set up. Thank you for your time and help. Sorry for my bad English

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If the patterning is intermittent it is probably interference, and most likely mains borne. In which case a fairly cheap low-pass filter should sort it out. NB. this is not a transient suppression filter, some mains conditioners are simply that, so check it out (the filtering is normally achieved by opposing coils of the live and neutral mains around a ferrite core.

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Typical of noise when the cables are too long. The noise is most likely entering through the video cable itself though it could be coming in on the AC. Although I'm relunctant to blame that as once it gets to the monitor is rectified to DC.

I would try putting a ferrite core on one end of the video cable see if that knocks down the noise. Try a shorter cable to see if the noise is on the cable or power.

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If the patterning is intermittent it is probably interference, and most likely mains borne. In which case a fairly cheap low-pass filter should sort it out. NB. this is not a transient suppression filter, some mains conditioners are simply that, so check it out (the filtering is normally achieved by opposing coils of the live and neutral mains around a ferrite core.

ty ty ty i got some low-pass filter and man that did it. thank you all for your help

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Could also try updating the video card drivers on the PCs. But because it's all the monitors on different systems, this is not likely.

not the drivers or it would have been doing it be for the move. it was the cables. but that is what i was thinking at first.

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