PlayStation 2 slim SCPH - 75003. „The disc could not be read.”

@sentinellkrk since you get the error „The disc could not be read” you will either have to clean your laser or replacing it. I'd start with cleaning it. Get any of the commercially available disk lens cleaners and run it a couple of times. You can also try and adjust your laser. Be careful with this and make sure that it you go this route that you measure your pot values before adjusting them. You can easily burn out your laser by going wild on it. SInce there is no good guide out for this (yet) follow something like these intructions

While you work on your PS2, take lots of pictures. Once you are done with it, take those pictures and create a guide for iFixit. That will help the next person that has a device with the same issues as you do. It's easy and fun to create these guides. https://ifixit.com/Guide/new The iFixit community will appreciate this.

Repair is War on Entropy!