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What happens to the voltages if you disconnect the x board? Does that stablize the voltage?
I don't think it's the Y main or buffer either. It wouldn't have that effect.
Ultimately the snow is probably from the main board, but it very well can be from the voltages going to it.
Are you able to take a picture of what the screen looks like and attach that here with the paperclip icon?
Well, it doesn't look like a main board. So that is sort of good news... It looks like a logic board.
I do see the thread to which you are referring, and if there is any of that you need to see in particular, I can provide it, but the possibilities of what is wrong is narrowing. I'm pretty sure it's a logic board.
It can always be from a cold solder joint or a crack in the solder somewhere. There are many things it can be. Usually the best anybody can do is take a very educated guess. Rarely do symptoms clearly point to one problem.
Capacitors are a common problem. It is very difficult though, to measure their capacitance. You have to basically remove it first. But to replace, you just need to get the numbers off the side and purchase a capacitor with the same capacitance - they are just a generic component like a diode or a resistor.
If the 2 bottom pictures are from your TV set, I suspect the E buffer board or it's the panel that's failed.
check the board number at shop jimmy, make sure it matches the board I've listed, ok?
Buffers ONLY affect that part of the picture it's located UNDER...There's no test you can run, unless you have a really FAST oscilloscope and can lock it to 60 Hz, then look at missing digital data or the ribbon cable connection to see if data is missing. And you better have a steady hand doing that work. I just replace it because they're cheap.
Hmm, Just answer removed the web info.
Here you go
That link should be accessible
Those boards aren't interchangeable unfortunately. Also note that Just Answer didn't repost your response back to me, I was looking at the list of "timed out" responses and saw you responded. I'll have to check yours regularly. As for a NEW TV...if you've had your TV for 8 years and want one of those "reasonably priced" 4K TV sets OR one of the TV sets that is a series 7000 or higher, that would be a MASSIVE improvement in picture quality.
I hope Samsung's compare mode works in this hyperlink. I tried setting ALL to the 55 inch flat screen models, but they set themselves to the default size. Sometimes 65 inchers are cheaper than 55 inchers due to customer demand. Anyways, look at the SERIES numbers of all these...they are series 7000 or Higher. That's the TOP OF THE LINE TV panels. Series 5000 or 6000 are so-so.