PS4 Original Disc fault. Plays dvd but not Blu-ray

Hi, my PS4 stopped reading game discs. It can read DVD no problem. When I put game disc in it sounds like an old floppy Drive then tries again but then says unrecognised disc. Tried wiping PS4 also nearly everything in safe mode. Still no joy, fitted new lazer and ribbon that goes behind PSU. Any ideas totally out of ideas.

Usually this is just a laser issue. You may have gotten a faulty laser.

If it can read DVD does that not prove it functions.