PS2 90004 fall to the ground

So, I accidentally dropped my almost new PS2. The height was about 50cm. She fell straight, and the disc was ejected. Nothing happened to her. No aesthetic damage, it reads the games on the first shot like a good new ps2. No inside pieces came off, I can feel it moving it.
Being totally ignorant on the hardware things, I wonder what this may have led to the technical level, in the internal components? Lens moved? I would think that ps2 hardware is pretty basic