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I don't know who made it, it looks like a zenith chassis. I had no need to take the back off. I just pulled the service menu up and changed the grayscale and sub bright. maybe one day I will open it, but for now I will watch it.
on the other zenith it has power no hv and sound comes in and out. it would have interference in the picture when it was cold but then go away. I need to put it in the bench and troubleshoot it down.
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