The dots are the size of individual pixels. The white picture with the FOX sports logo is supposed to be a full white screen - The colored pixels shouldn't be there and represent pixels that are not lighting, or not lighting fully. On the black picture with the FOX sports logo it should be a completely black screen, the lit pixels should not be lit.
I sold one of these for $60 after other buyers rejected it at $80. Some people don't notice the dots, or are willing to live with them if the price is low enough.
Stick it on the shelf for a while until another set you can get a board from turns up for the right price.
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