It seems like a stain rather than rust, but if the CPU functions properly, you should steer clear of rubbing it. Doing so could harm it unnecessarily. It might be worth verifying if debris entered the socket, as that’s a more probable issue.
It seems like a stain rather than rust, but if the CPU functions properly, you should steer clear of rubbing it. Doing so could harm it unnecessarily. It might be worth verifying if debris entered the socket, as that’s a more probable issue.