We just recently moved and had the moving company store our small
color tv set. Now, when we plug it in to satellite tv there is a line
originating from the bottom of the screen and that horizontial line
scrolls all the way up the screen - this repeats over and over.
Somewhere in the dark reaches of my brain I seem to recall that this
could indicate a "tube" going out or having gone out? Suggestions?
Could it be the satellite install? I doubt that, but want other's
opinion.

Thanks in advance,

Lana

wrote:
We just recently moved and had the moving company store our small
color tv set. Now, when we plug it in to satellite tv there is a line
originating from the bottom of the screen and that horizontial line
scrolls all the way up the screen - this repeats over and over.
Somewhere in the dark reaches of my brain I seem to recall that this
could indicate a "tube" going out or having gone out? Suggestions?
Could it be the satellite install? I doubt that, but want other's
opinion.

Thanks in advance,

Lana
You have some electrical noise being generated some where around you.
like a bad insulator on the line, bad grounding on the shielding
etc..


http://webpages.charter.net/jamie_5"

wrote in message
...
We just recently moved and had the moving company store our small
color tv set. Now, when we plug it in to satellite tv there is a line
originating from the bottom of the screen and that horizontial line
scrolls all the way up the screen - this repeats over and over.
Somewhere in the dark reaches of my brain I seem to recall that this
could indicate a "tube" going out or having gone out? Suggestions?
Could it be the satellite install? I doubt that, but want other's
opinion.

Thanks in advance,

Lana

What type of connector from sat box to TV?

wrote:
We just recently moved and had the moving company store our small
color tv set. Now, when we plug it in to satellite tv there is a line
originating from the bottom of the screen and that horizontial line
scrolls all the way up the screen - this repeats over and over.
Somewhere in the dark reaches of my brain I seem to recall that this
could indicate a "tube" going out or having gone out? Suggestions?
Could it be the satellite install? I doubt that, but want other's
opinion.

Thanks in advance,

Lana

What you describe sounds like 50 or 60 Hz 'hum bars' in the
picture...the video equivalent of a steady hum in an audio signal at the
power line frequency. The cause is the same; namely a 'ground loop' or
improper/insufficient shielding of the video signal somewhere along the
line.

It's also possible that this noise--and it definitely is noise, ie:
outside interference of some sort--is something different. My bet's
still on a shielding issue. Remove and replace each connection, making
sure all are tight. Examine all cables for condition. If it's
possible, substitute known-good cables one at a time to see if the
symptom improves.

You may not have the technical 'chops' to pull all this off; but it's
what it will take to dx the problem. Find someone to help you. One
thing for certain; it's not a symptom of a bad tube.

jak

On Dec 7, 10:44*pm, jakdedert wrote:
wrote:
We just recently moved and had the moving company store our small
color tv set. *Now, when we plug it in to satellite tv there is a line
originating from the bottom of the screen and that horizontial line
scrolls all the way up the screen - this repeats over and over.
Somewhere in the dark reaches of my brain I seem to recall that this
could indicate a "tube" going out or having gone out? *Suggestions?
Could it be the satellite install? *I doubt that, but want other's
opinion.

Thanks in advance,

Lana

What you describe sounds like 50 or 60 Hz 'hum bars' in the
picture...the video equivalent of a steady hum in an audio signal at the
power line frequency. *The cause is the same; namely a 'ground loop' or
improper/insufficient shielding of the video signal somewhere along the
line.

It's also possible that this noise--and it definitely is noise, ie:
outside interference of some sort--is something different. *My bet's
still on a shielding issue. *Remove and replace each connection, making
sure all are tight. *Examine all cables for condition. *If it's
possible, substitute known-good cables one at a time to see if the
symptom improves.

You may not have the technical 'chops' to pull all this off; but it's
what it will take to dx the problem. *Find someone to help you. *One
thing for certain; it's not a symptom of a bad tube.

jak

Have you tried another tv? If the problem is stilll there, it
definitely is not the tv!

On Sat, 6 Dec 2008 17:45:49 -0800 (PST), put finger
to keyboard and composed:

We just recently moved and had the moving company store our small
color tv set. Now, when we plug it in to satellite tv there is a line
originating from the bottom of the screen and that horizontial line
scrolls all the way up the screen - this repeats over and over.
Somewhere in the dark reaches of my brain I seem to recall that this
could indicate a "tube" going out or having gone out? Suggestions?
Could it be the satellite install? I doubt that, but want other's
opinion.

Thanks in advance,

Lana

These articles describe the "hum bar" phenomenon:
http://svconline.com/images/archive/...eansignals.pdf
http://svconline.com/mag/avinstall_losing_hum_bar_2/

They're on the techy side, though.

If you can't resolve your ground loop problem by reorganising your
cabling, the author suggests two possible solutions - a Video
Isolation Transformer or a Video Common-Mode Choke.

- Franc Zabkar
--
Please remove one 'i' from my address when replying by email.