Question about Toshiba 50HP66 50 in. Plasma Television

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Red dots like"snow" are all the way across the screen when dark colors are present on my 1and 1/2 yr old toshiba 50HP66 tv.

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  • 178 Answers

If they are moving, it is a Random pixel discharge. This can be caused by 3 different problems, that are not easily diagnosed through a chat like this. 1. I could be a miss adjustment of critical voltages that control pixel discharge in the set, although i have not looked at your set in particular, some models are automatic and don't have an adjustment. 2. It could be the x board or equivalent, 3. It could be the panel it's self.

in my experience with this problem the adjustment rarely fixed the problem, more likely the Panel is failing, although sometimes the x board will cause this issue.

I am sorry I cannot get you any closer than that, I recommend getting a repair tech out to check it out. This set is repaired by replacing boards not component level, the boards can be expensive and I don’t want to recommend a board replacement unless I was the tech to actually see the problem.

Posted on Oct 05, 2009

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I have a toshiba 50hp plasma t.v. and it made a popping sound and the picture went dark and somewhAT FUZZY. CAN STILL SEE PICTURE BUT BAD COLOR AND ITS DARK. IS THIS ANN EASY FIX OR IS IT NOW TRASH?


I am ready to bet my lunch that you have a bad ZSUS board.
There is less than 1% chance I would go hungry and that's with around of thousand of such repairs on my back.
This is the link for what you need:
http://www.coppelltvrepair.com/p/263/75003043-zsus-board-for-toshiba-50hp66-repair-service
Good luck!

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1 Answer

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I had the same red dots in the dark areas and it was driving me nuts. I also have a toshiba 50hp66. Luckily I found out that it's an easy fix. Open up the back of your tv and on the left side you will see two adjustment pots labelled Vsc and Vy. I first marked with a sharpie where the factory defaults were. Then I adjusted down (to the left) the Vy a little and the red spots were gone! My TV looks like new. Hope this helps.

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1 Answer

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1 Answer

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what you can do is take off the back pannel and there is a cord on the top of the board that looks like a computer board, there are many boards in the TV but the one I am talking about is twords the bottom where the video jacks plug in to the TV. Ok once you have located the pannel there is a cord on the top kinda tword the right side, it is many wires inside a black covering. What you need to do is just simply unplug it and plug it back in, do this as many times to try to get it to fix the problem.

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It sounds like you have a fault on the picture frame board and for a competant technician this is not much of a problem. Or it could be something as simple as dry solder joints. Either way the tv can be saved and is worth fixing. Hope this helps.

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1 Answer

Toshiba 50HP66 Blank Screen with sound


I would suggest to read what other members have reported by clicking here.
Good Luck.

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