Sanyo green & magenta bars problem.
 

Hi hdtv group,

I hope someone can help me. I bought a new Sanyo 50" Plasma HDTV 3
weeks ago. When the cable people installed my hdtv, I began to see a green
bar & a megenta bar moving up the screen. The cable man was here again
today and gave me a new hdtv box and this afternoon the problem came back.
Analog signals are fine but everything coming from this box has the bars.
When I disconnect the vidio cables from the new box, the bars go away. I
don't get it! Does the problem have something to do with how this TV is
handling the digital signals? At times the bars are dispursed and don't
seem to affect the picture and sometimes the bars shrink to about 2" wide
and do affect the picture. Should I return the TV or what?



Thanks / Ed

Sanyo green & magenta bars problem.
 

Ed Powers wrote:
Hi hdtv group,

I hope someone can help me. I bought a new Sanyo 50" Plasma HDTV 3
weeks ago. When the cable people installed my hdtv, I began to see a green
bar & a megenta bar moving up the screen. The cable man was here again
today and gave me a new hdtv box and this afternoon the problem came back.
Analog signals are fine but everything coming from this box has the bars.
When I disconnect the vidio cables from the new box, the bars go away. I
don't get it! Does the problem have something to do with how this TV is
handling the digital signals? At times the bars are dispursed and don't
seem to affect the picture and sometimes the bars shrink to about 2" wide
and do affect the picture. Should I return the TV or what?



Thanks / Ed


Sounds like a grounding problem to me. Are you sure the power outlet
for all your stuff is *really* grounded? How about the coax cable
coming into the house from outside - is it grounded?


--
jer
email reply - I am not a 'ten'

Sanyo green & magenta bars problem.
 

On Mon, 5 May 2008 18:16:25 -0400 Ed Powers wrote:

| I hope someone can help me. I bought a new Sanyo 50" Plasma HDTV 3
| weeks ago. When the cable people installed my hdtv, I began to see a green
| bar & a megenta bar moving up the screen. The cable man was here again
| today and gave me a new hdtv box and this afternoon the problem came back.
| Analog signals are fine but everything coming from this box has the bars.
| When I disconnect the vidio cables from the new box, the bars go away. I
| don't get it! Does the problem have something to do with how this TV is
| handling the digital signals? At times the bars are dispursed and don't
| seem to affect the picture and sometimes the bars shrink to about 2" wide
| and do affect the picture. Should I return the TV or what?

Is the HD cable box connected via HDMI or analog component?

Are you saying that the problem did go away after the box change, before it
came back? How much time was it?

Are both the cable box and TV plugged into the same power strip?

Do you have any other digital and/or high definition video sources to also
compare?

--
|WARNING: Due to extreme spam, I no longer see any articles originating from |
| Google Groups. If you want your postings to be seen by more readers |
| you will need to find a different place to post on Usenet. |
| Phil Howard KA9WGN (email for humans: first name in lower case at ipal.net) |

Sanyo green & magenta bars problem.
 

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




wrote in message
...
On Mon, 5 May 2008 18:16:25 -0400 Ed Powers
wrote:

| I hope someone can help me. I bought a new Sanyo 50" Plasma HDTV 3
| weeks ago. When the cable people installed my hdtv, I began to see a
green
| bar & a megenta bar moving up the screen. The cable man was here again
| today and gave me a new hdtv box and this afternoon the problem came
back.
| Analog signals are fine but everything coming from this box has the
bars.
| When I disconnect the vidio cables from the new box, the bars go away.
I
| don't get it! Does the problem have something to do with how this TV is
| handling the digital signals? At times the bars are dispursed and don't
| seem to affect the picture and sometimes the bars shrink to about 2"
wide
| and do affect the picture. Should I return the TV or what?

Is the HD cable box connected via HDMI or analog component?

Are you saying that the problem did go away after the box change, before
it
came back? How much time was it?

Are both the cable box and TV plugged into the same power strip?

Do you have any other digital and/or high definition video sources to also
compare?

--
|WARNING: Due to extreme spam, I no longer see any articles originating
from |
| Google Groups. If you want your postings to be seen by more
readers |
| you will need to find a different place to post on Usenet.
|
| Phil Howard KA9WGN (email for humans: first name in lower case at
ipal.net) |

Sanyo green & magenta bars problem.
 

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'

Sanyo green & magenta bars problem.
 

In article [email protected] ,
says...
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.


This is absolutely the correct answer. Been there, done that.

CB

Sanyo green & magenta bars problem.
 

On Tue, 06 May 2008 19:03:42 -0500 Jer wrote:
| 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.

Exactly.

To Ed:

If you have a voltmeter, measure the voltage between the cable wire and the
box. If you get anything, be sure the cable guy sees it.

Check where _everything_ coming into your house is grounded. The correct way
is to have it all coming in at the same place (within a few feet) and grounded
in common. That includes the phone lines, too. Even the water and gas if
they are metallic pipes (you don't want to see voltage between the gas line
and power ground wire, do you?).

If the cable wire is coming in to a different place where it cannot be grounded
properly, they need to move it.

--
|WARNING: Due to extreme spam, I no longer see any articles originating from |
| Google Groups. If you want your postings to be seen by more readers |
| you will need to find a different place to post on Usenet. |
| Phil Howard KA9WGN (email for humans: first name in lower case at ipal.net) |