Hitachi 42HDT79 Plasma TV "Dancing" Pixels Issue
I picked up a Hitachi 42HDT79 sitting by the curb today and plugged in it. So far everything works great, except for a "dancing" pixel issue along the edge of certain color combinations.
Now first, before I get into describing the issue I'm going to note that I haven't taken it apart yet. I plan on replacing the 3300uf @ 100volts cap, assuming this problem is fixable. It smells badly of cigs.
Now, back to the issue. With certain color combinations, instead of a straight line, certain pixels from one color "dance" into the other. It's worst with black and other colors. Below are some pictures of some color combinations that have this issue:
And then certain color combinations are fine and 100% sharp:
It's fine with more colors than it's bad with - for example with that purple background, the only two colors that react are black and that lime green. Those pixels are just statically wrong - they dance around in similar formations shown in the pictures, unrelated to their location on the screen, only related to the colors they're showing. I should note this happens on any input on the TV - HDMI, composite, S-video, etc.
It's pretty noticeable overall - like on a soccer field, the shadowed portions of the field the pixels are dancing everywhere, probably because it's that green and black combination.
Now I'm wondering if all this could be fixed by cleaning? Or is one of the boards most likely permanently damaged and need to be replaced? Or is there a specific part that could have gone bad causing an issue like this? If anyone could point me in the right direction I would greatly appreciate it!
Now first, before I get into describing the issue I'm going to note that I haven't taken it apart yet. I plan on replacing the 3300uf @ 100volts cap, assuming this problem is fixable. It smells badly of cigs.
Now, back to the issue. With certain color combinations, instead of a straight line, certain pixels from one color "dance" into the other. It's worst with black and other colors. Below are some pictures of some color combinations that have this issue:
And then certain color combinations are fine and 100% sharp:
It's fine with more colors than it's bad with - for example with that purple background, the only two colors that react are black and that lime green. Those pixels are just statically wrong - they dance around in similar formations shown in the pictures, unrelated to their location on the screen, only related to the colors they're showing. I should note this happens on any input on the TV - HDMI, composite, S-video, etc.
It's pretty noticeable overall - like on a soccer field, the shadowed portions of the field the pixels are dancing everywhere, probably because it's that green and black combination.
Now I'm wondering if all this could be fixed by cleaning? Or is one of the boards most likely permanently damaged and need to be replaced? Or is there a specific part that could have gone bad causing an issue like this? If anyone could point me in the right direction I would greatly appreciate it!
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