Known as the ''PS2'', it is a sixth-generation video game console first released by Sony in Japan in March 2000. The United States saw it later in 2000 with the SCPH-30000. Repair of this device requires only common tools, but can get tricky.
Try using this this and see if it works. More often then not, all you need to do to fix this issue is reset a few gears to the point they'll push the tray back into the drive.