The screws at the network card are black.Is this a repair product?

I stated in the statement that the channel of nvidia partners bought a large number of jetson nano, but many of them lost their response after restarting. Gradually, it was found that there was a problem with the core board, but there was one point that made me very confused. The screw in the network card was black.Is this a repair product?Thank you very much!

Hi, do you mean there are two kinds of screws on your boards? Can you please upload photo for check?

This is the jetson nano that most people receive!/c/dOgAAAAAAAAA&bo=PwJOAj8CTgIRECc!

This is the jetson nano I received!/c/dOAAAAAAAAAA&bo=OARcBzgEXAcRIBc!

I don’t know if you can see it

It’s should be just different source of screw.