Colored Vertical Bar on Panasonic Plasma model TH-50Px6U

[bpersimmon]

I have an older Panasonic Plasma model TH-50Px6U. It's about 12 years old or so. I've already replaced the power supply board, and the vertical buffer board. The buffer board was replaced because there was a black rectangular bar in the center of the picture that was extended half way down. Replacing the buffer fixed the problem.

Now I am experiencing a slightly different problem. There is a similar bar, this time consisting of colored lines, vertically oriented and extending 1/2 way up from the bottom. See PICTURE w/ PBS video.

At first I thought this might be another buffer failure. I disassembled the TV, unclipped the ribbon cable, cleaned it and clipped it in again. No change.
When the ribbon cable is unclipped I took at look at the picture. This time there is a vertical black bar immediately adjacent to the colored bar.

Now I suspect that the panel is bad as if it was the buffer board the black bar would cover the entire width on the screen controlled by ribbon connector. But it's 1/2.

I attached 3 photos:
1. Color Bar on PBS screen
2. Black/Color bar - ribbon cable unclipped
3. Back of TV -- I took this one a few years ago, upper center vertical buffer is removed. Lower section where I was working is circled.


Does anyone know what could be causing this? Bad panel?

Thanks.

[Demonata08]

Re: Colored Vertical Bar on Panasonic Plasma model TH-50Px6U

I have an older Panasonic Plasma model TH-50Px6U. It's about 12 years old or so. I've already replaced the power supply board, and the vertical buffer board. The buffer board was replaced because there was a black rectangular bar in the center of the picture that was extended half way down. Replacing the buffer fixed the problem.

Now I am experiencing a slightly different problem. There is a similar bar, this time consisting of colored lines, vertically oriented and extending 1/2 way up from the bottom. See PICTURE w/ PBS video.

At first I thought this might be another buffer failure. I disassembled the TV, unclipped the ribbon cable, cleaned it and clipped it in again. No change.
When the ribbon cable is unclipped I took at look at the picture. This time there is a vertical black bar immediately adjacent to the colored bar.

Now I suspect that the panel is bad as if it was the buffer board the black bar would cover the entire width on the screen controlled by ribbon connector. But it's 1/2.

I attached 3 photos:
1. Color Bar on PBS screen
2. Black/Color bar - ribbon cable unclipped
3. Back of TV -- I took this one a few years ago, upper center vertical buffer is removed. Lower section where I was working is circled.


Does anyone know what could be causing this? Bad panel?

Thanks.

Not experienced at all with these issues myself. But i can tell you i just finished working on a tv that was showing bars halfway down the screen. And yeah it turned out to be the panel.