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Horizontal Lines scrolling on screen

I have an Optoma EP719 projector that was just cleaned (very dusty) and bulb replaced. However now I have another issue. When running the projector from my cable box, there are scrolling horizontal lines constantly. Any suggestions what this could be and possible fix? Thanks!

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I had a similar issue with my Mitsubishi HD 1080. My power supply went out, I had it replaced and it works like new. However, just today I had AT&T U-Verse installed. When the cable guy was showing me the new HD channels all seemed good. This evening (about 5 hours after being installed) I started seeing these horizontal lines across my screen. The picture was still HD quality, but those annoying lines just wouldn't go away. Anyway, after reading a few blogs on-line suggesting interference or bad grounding, it hit me!!! The AT&T guy who installed my U-Verse (cable, internet and phone) had set the modem on top of my TV!!! It was just starring at me this whole time. So I removed the modem off the top of my TV and put it on a side table just to see what would happen and sure enough the lines were gone!!! You may not have the exact same problem, but it may be some type of interference (cell phone, modem, etc, either on top or around your TV that is causing the issue... Hope this helps. Thanks.

Posted on Nov 21, 2008

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