The console doesn’t read original games at all, or reads them but after a while freezes, usually at the same point, and things get worse with non-original backup discs. In the vast majority of cases it’s the CD drive that is worn out… some fix it by changing the lens calibration settings, adjusting some tiny screws (potentiometers) on it directly, but the simplest solution is to replace the drive with a new one. Many come from China at a good price, but be VERY careful about the exact model, because there are several with different characteristics (e.g. a different length of the flat connection cable) and not all are interchangeable [the model names are: KSM-440ADM, KSM-440BAM, KSM-440AEM].