I own a SCPH-39004 FAT PlayStation 2. It only reads one game (Gladiator), and for other games, shows a disk read error screen.
I tried to clean the lens, and adjust the lens height through two related screws. I also turned the lens potentiometeres clockwise a bit, but no luck.
I don't have oscilloscope, but a HIOKI 3256 multimeter.
How can I fix this problem?