DTV interference lines

[dtvboogie]

I just discovered this forum and hope you can answer my question. I have a DirecTV HDTV system (H20, no recorder) with a 5 LNB dish. It was professionally installed and is connected to a Sony 70" XBR TV. In the past couple of weeks, I have noticed diagonal lines that alternate to horizontal lines on both HD and SD channels. Signal strength was 65 on 101, but after fine tuning, I was able to increase the strength to 77 on 101 and 68 on 119. My cables are RG6 and the system has been working perfectly until a couple of weeks ago. The lines do not show up when viewing DVDs, but are are present 95% of the time when watching satellite. Has anyone experienced a similar problem? Is this a line or a box problem?

Here is a photo of the lines.
http://i92.photobucket.com/albums/l10/vetteset/HDTVscreenlines.gif

Thanks in advance for any suggestions.

[ebms1]

I just discovered this forum and hope you can answer my question. I have a DirecTV HDTV system (H20, no recorder) with a 5 LNB dish. It was professionally installed and is connected to a Sony 70" XBR TV. In the past couple of weeks, I have noticed diagonal lines that alternate to horizontal lines on both HD and SD channels. Signal strength was 65 on 101, but after fine tuning, I was able to increase the strength to 77 on 101 and 68 on 119. My cables are RG6 and the system has been working perfectly until a couple of weeks ago. The lines do not show up when viewing DVDs, but are are present 95% of the time when watching satellite. Has anyone experienced a similar problem? Is this a line or a box problem?

Here is a photo of the lines.
http://i92.photobucket.com/albums/l10/vetteset/HDTVscreenlines.gif

Thanks in advance for any suggestions.

first physically chech all tv connections... then try a different tv ... i dont think a signal problem would do that .... is the dish & sat lines grounded

[dtvboogie]

first physically chech all tv connections... then try a different tv ... i dont think a signal problem would do that .... is the dish & sat lines grounded

Thanks for the quick reply. I have had the HD setup for two years, but the HD20/5 LNB dish was installed about six months ago. Both the dish and lines are grounded, and all connections are snug and in good condition. Cables are all RG6, installed by DirecTV. As far as connecting another TV, I have only one HDTV. Would a standard definition TV display signals from the HD20 receiver (minus the HD channels)?

[ebms1]

Thanks for the quick reply. I have had the HD setup for two years, but the HD20/5 LNB dish was installed about six months ago. Both the dish and lines are grounded, and all connections are snug and in good condition. Cables are all RG6, installed by DirecTV. As far as connecting another TV, I have only one HDTV. Would a standard definition TV display signals from the HD20 receiver (minus the HD channels)?

just use the a/v lines

[dtvboogie]

Will try that today. Thanks again for the help.

[shadough]

It looks like dirty power. You'll likely need a special electrical filter. I think its made by panamax.

[digitaldogs]

Those are hum bars. Caused by a rouge voltage on ground.
Try unpluging everything except the tv and Dtv box. If problem still, there hook to another input on back of Sony.
If still there, disconnect one at a time other dtv boxws in other rooms and see if the humbars dissapear.

If you find the leak at one of the dtv boxes in other rooma use a ground adaptor which elimanates the ground prong.

[danger502]

LOL - old thread, but I was just surfing some of my former hangouts to see whcih were still around. Kinda suprised to find this place - I was actually looking thru some old pics and found a screen shot w/the "dsschat.com" URL (anyone remeber that?) I just clicked this thread because the title looked interesting.

Amyway, I digress ... if anyone's interested I'd say it Looks like plain old RF interference to me (i.e. monitor cables are too close to something that receives/sends SOMETHING wirelessly that's poorly shielded) and it's too close to the monitor's cable). Could be a TV or even a tuner card (sat, TV, etc) I'd try shutting down/disabling anyhing near the monitor cables one by one until you find the culprit.

Disclaimer: I aint no expert tho! :)

"Dirty power" that's leaking from some source would be my second guess.

You never came back to Digitaldog's post either - sounds like he knows what he's talking about. I'd be interested to see if you solved your prob and exactly what was causing it. I know this is a pretty old thread - but if you somehow see these replies dtvboogie, how about a comeback?

I've been out of things for a while, but at the forums I used to admin, posting once and getting several responses and then disappearaing was considered bad forum etiquitte (sp? LOL).

Drop us a line dtvboogie - did you find a fix?