A Sony main board 1-879-537-12 for Sony sound system HCD-E500U. This Sony main board 1-879-537-12 is the original  main board in the  Sony HCD-E500U sound system . We have this Sony main board 1-879-537-12 but we are not sure what is the story about it , so we do not want to take any chance and we sold it as-is as you can see in the picture without any warranty or return . The board look new but? We ship parts almost anywhere in the world...Just send an Email with your adress details to get a shipping cost estimate.