minor interference w/ optoma h31

[jaymoh]

hey all... i recently purchased an optoma h31 for use in my basement (ceiling-mounted). i've noticed that while i'm playing dvds, there's some sort of interference pattern affecting the picture. basically, there are two slightly lighter bars that move upwards on the screen. these are only noticeable when the image is darker. i'm running a 25' component cable from my projector to a wall plate, and a 3' component cable from the plate to my Yamaha RX-V559 receiver. an additional 3' cable runs from my dvd player to the receiver. all of these cables are the "Performance Plus Component Video Cable" from AVCable.com.

thanks for any help on solving this annoyance.

[mtrycrafts]

hey all... i recently purchased an optoma h31 for use in my basement (ceiling-mounted). i've noticed that while i'm playing dvds, there's some sort of interference pattern affecting the picture. basically, there are two slightly lighter bars that move upwards on the screen. these are only noticeable when the image is darker. i'm running a 25' component cable from my projector to a wall plate, and a 3' component cable from the plate to my Yamaha RX-V559 receiver. an additional 3' cable runs from my dvd player to the receiver. all of these cables are the "Performance Plus Component Video Cable" from AVCable.com.

thanks for any help on solving this annoyance.

Sounds like a ground loop signal there somehow. Do you have cable TV connected in any manner to this setup? If so, unplug it and see if those lines are gone.

[jaymoh]

thanks! that's definitely the problem. how can i go about getting rid of the ground loop on the cable tv?

[mtrycrafts]

thanks! that's definitely the problem. how can i go about getting rid of the ground loop on the cable tv?

Here you go.:D

http://www.cencom94.com/gpage.html8.html

Or, maybe if you copy that page and go to Radio Shack, they may have one too.:)

[corysmith01]

I was just looking at the linked page, but couldn't determine which is needed, the isolator or the high pass filter. I'm interested b/c I think I'm having the exact same problem; scrolling lines on my cable channel that are non-existent on x-box and dvd inputs. I'd like to see if I could get rid of them. Tried swapping component cables and that did nothing...got the same results.

[mtrycrafts]

I was just looking at the linked page, but couldn't determine which is needed, the isolator or the high pass filter. I'm interested b/c I think I'm having the exact same problem; scrolling lines on my cable channel that are non-existent on x-box and dvd inputs. I'd like to see if I could get rid of them. Tried swapping component cables and that did nothing...got the same results.

You need the isolator.