Why is my old console stop reading discs?

Greeting to whomever, I had the PS2 Slim for 18+ years. It plays & runs normally, but over the years the console beings to show its age. These were minor issues that I could replace, but it has gone to areas that I'm not familiar with; that being the interior of the console. First, the second slot for the memory card couldn't read the memory card & second, the disc reader or the mechanism that spins the disc isn't working properly. (I am aware that those are the known issues in the PS2 line, but it lasted me for so long that I don't want to give up the old console.)