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Originally Posted by Haydb
My parents have just got a new TV and a combi VCR/DVDR. At the same time they have upgraded to NTL digital.
Having tuned in the channels to the VCR/DVDR the cable channel has horizontal lines all across the screen when watched or recorded through the VCR/DVDR. At the back of the VCR/DVDR the line in has the input from both NTL and the rooftop aerial. If I remove the coaxial from the rooftop aerial the cable picture goes perfect but obviously the aerial becomes redundant.
When the VCR/DVDR is off, all pictures are fine.
Any ideas what causes the interference and are there anyways around it?
Hope this makes sense?
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How is the ntl box connected to the VCR/DVDR combo?
Sounds suspiciously like there's a bad connection between aerial and the combo box, or that there's a defective RF decoder in the combo unit.
If the bars in question are moving that indicates an issue with AC voltage interfering with the picture.
I'll probably go for option 2 there. The combo is badly shielded and there's AC frequencies munting the combo or the TV and they're getting in via the aerial and RF decoder.