I just don't underatand, I bought another optical drive with a new laser installed and I took out the optical mother board from the new drive replacing it with the original one and I still get un recognized discs and I know for a fact it's the optical drive mother board because I tested the new optical drive with it's mother board and I could play blue rays but not ps4 games which gave me an error pretty much saying not compatable. I swapped back to the original optical mother board and pretty much back to normal again, not recognizing discs and I checked everything, even the rollers. I just don't get it, I always had back luck with play stations. I don't think anyone had changed it before and therefore the optical mother board should still be original, so what's happening here?