theres a few ways number 1:turn off ps3 by the back then u keep ur hand on the power button the first time wont work cuz it doesn't know u want to acces that menu so the seconnd time it should say on...
Hard Drive:Possibly because your filesystem is broken or corrupt. TO FIX: MUST HAVE WINDOWS INSTALL DISK/RESTORE, THEN REINSTALL, MUST HAVE ACTIVATION KEY FOR REINSTALL!
CD/DVD DRIVE: WORN OUT...
A couple of things
-The disk could be bad and needs to be replaced
- Some of the PS2 older format games need to spin at faster rates, standing up the PS2 helps with spin speed. This is the blue disk...