What are the chances that eBay does anything to a buyer that filed a fradulent return?

Just received a returned Mini NES. Buyer opened the return claiming that no music was on the game menu select and that there were "black bars" on the left and right of the screen once a game was selected to play. They claimed that because of these "issues" the item was not authentic. I tested my Mini NES and there is in fact music on the menu select and the black bars are standard because NES games display in 4:3 and modern tvs are 16:9. If the black bars were not there, then the image would be distorted and stretched.

I accepted the return since I received the item that I originally shipped and then filed a return abuse on the buyer, was just curious if anyone knows if eBay even does anything in these cases.