Video Asylum

HD comcast cable and a scrolling Horizontal Green Bar

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usmc1994

(A)

I have a dell mp2200 projector and just got digital and HD cable service from comcast. I notice that with the projector on and connected via Component video cables to the Motorola cable box I get a scrolling Green bar on the screen. This bar appears on all channels and even when the projector is tuned on but after the cable box has turned off. As soon as I unplug the RG-6 cable from the back of the Motorola box the Green bar goes away, but returns when the RG-6 cable is reconnected.
Using the same input on the projector and the same Component video cables, my progressive scan DVD player is great, and does not have this green bar issue.
The projector is compatible with the following standards: NTSC, PAL, SECAM, and HDTV (480i/P, 576i/P, 720P and 1080i)
Could this be a grounding or shielding problem with my Cable service?
Thanks for the help and suggestions.

Follow Ups:

Re: HD comcast cable and a scrolling Horizontal Green Bar - DaveNole 12:09:52 12/18/03 (1)
I had the same problem after routing my component video cables through my new pre-amp - a slow moving green line moving up the screen.
My problem was a ground loop coming in through the cable TV cable. After trying a couple of "solutions", I tried installing a Video Isolator - completely eliminated the green line.
The part I ordered was
http://www.partsexpress.com/pe/showdetl.cfm?&User_ID=17174297&St=6675&St2=49713928&St3=-87066376&DS_ID=3&Product_ID=16262&DID=7
Hope this helps.
- Re: HD comcast cable and a scrolling Horizontal Green Bar - usmc1994 20:53:15 12/18/03 (0)
  Great, Thank you. I will give it a try!

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