Ed Powers wrote:
> Hi Phil & group,
>
> Thank you for the responses. As I tried to explain, sometimes
the
> bars were more dispursed and didn't affect the picture -- that's how it
was
> when the cable guy left - but they drew them selves down to about 2"
and
> were much more pronounced (affecting picture)that afternoon. Today I
tried
> something - probably the first thing I should have thought of - I simply
> disconnected the coax input to the cable box - problem went completely
> away - nice clean gray screen with absolutely no bars! When I hook the
> input from the cable company back to the cable company tuner - bam, the
> problem is back (with the tuner turned off ) - green and magenta bars
> traveling up the screen! Even thought the cable dude brought a
computer
> and said that the signal was OK - I'm quite certain the interferance is
> coming down the line. I suspect when I show them this the next time,
> they'll realize that it IS coming down the line -- the cable dude saw
the
> lines (dispursed) on both cable boxes but didn't know what the problem
was.
>
>
>
Thanks
> again / any thoughts? Ed
Two words... ground loop.
There are two different ground circuits being fed to your equipment -
one to the cable box, the other to the TV - and one of them isn't really
a ground. When the cable guy fed the signal to his PC, he wasn't
connected to the same ground your TV is, assuming his PC had any ground
(which I highly doubt), and the problem didn't present itself to the PC.
Fix the broken ground and the problem will clear up.
--
jer
email reply - I am not a 'ten'
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