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Subject:
RGB Flicker -- Television set troubleshooting
Category: Science > Technology Asked by: hightechfool-ga List Price: $8.00 |
Posted:
01 Aug 2006 20:38 PDT
Expires: 14 Aug 2006 11:56 PDT Question ID: 751702 |
I've had my 30" widescreen television for 2 years now. From the day I got it...I've had an annoying problem with it. It doesn't happen often, and it's completely unpredictable (hence it is usually not reproducable). Luckily, I got a photo of the sharp RGB lines that flicker across the screen. It only happens when I play a DVD. I know this is probably an issue I need to have looked at by a pro...but I'm reluctant to spend money on something like that until I'm sure whether it's a problem with the TV DVD player or Monster Component Video connections! Monster is an extremely reputable source for component connections so it's just so hard for me to believe the cables are the problem. Anyway...enough of my rambling, check out the link below to see the video problem I'm talking about!! Please do some research and see if you can identify this specific anomaly :( http://www.jspectacle.com/temp/tv.JPG | |
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There is no answer at this time. |
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Subject:
Re: RGB Flicker -- Television set troubleshooting
From: stanmartin1952-ga on 02 Aug 2006 11:33 PDT |
Sometimes when a tv isn't adjusted properly, you can see the scanning lines returning to the top of the frame. Could you borrow another dvd player to see if the problem occurs with that one as well? It doesn't look anything like a cable problem. |
Subject:
Re: RGB Flicker -- Television set troubleshooting
From: hightechfool-ga on 02 Aug 2006 12:56 PDT |
I was skeptical that it could be a problem with the TV adjustment...though it sounds like you know it might be. From the above few comments it's starting to seem like it's the TV. I'll try to get my hands on a player (and maybe extra cables) to test it once and for all |
Subject:
Re: RGB Flicker -- Television set troubleshooting
From: sorwin-ga on 02 Aug 2006 16:19 PDT |
The three coloured lines are all sloping upwards, hence they certainly occur during the vertical flyback period. In my opinion this is caused by the DVD copy protection system "Macrovision" (see Google) in combination with a sporadic failure of the TV vertical blanking. The way Macrovision works is to insert a full amplitude line (or lines) during the vertical blanking period. Television receivers are normally unaffected by this peculiarity. But VCR's and disc recorders are severely disturbed by it, because they commonly use the vertical blanking period in order to measure and adjust incoming video amplitude. So I think the problem lies with the television receiver. But the sporadic nature of the fault might make the precise diagnosis difficult. John in London. |
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