When I boot up my PS2, it rattles and makes noise. The noise does not happen if there is no disc in the drive, so it has to be the disc mechanism. But the noise is worse at booting before the game begins to load. And sometimes there is no noise at all.
I find that it helps to have the PS2 standing vertically, I put big books on both sides to prevent it from tilting.
What is likely to be the cause? Worn out ball bearings? Or does it just need service and grease/oil?
It's not more than about three years old, but I guess it has been used for about 1800-2000 hours.
It is still working but I guess I should deliver it for service/repair, or prepare to buy another PS2. (If PS3 was still fully PS2 compatible I would buy a PS3 right now.)