Recently I pulled out my PS2 to work further on it since the parts came in. I replaced the battery and the motor. By the way don’t order any of motors here in the US because the ribbon cable is way too short. I had to order the correct part from China and they are becoming increasingly rare. Unless you pull one out of a DVD player or something. The laser works just fine even after replacing it. Even after installing a new motor nothing happened, no spin just a quick buzz sound which to my theory is the motor attempting to spin but unable due to a minor error that makes it spin. Best chance, it has to be the fuse. The fuse is located behind the motherboard which requires disassembling. This fuse is not your typical tube like fuse that you can just pluck out. They are tiny little fuses soldered into the motherboard. I don’t have a diagnostic to tell whether or not the fuses are bad. The naked eye is unable to see between a good fuse or a bad fuse. The fuse is what makes the motor function and if a fuse goes bad then it simply will not work. By the way there is multiple fuses so this kind of work gets real technical. Either find somebody who works on games consoles or start doing the research for repairs on Youtube and do the work yourself.