Boost your PlayStation 3 system's storage space Make more room for. Must check original model number on laser lens before. Serial Numbers Please Double. If it's a PS3 Slim, it isn't PS2 backwards compatible, though you can still enjoy PS3 and PSone games on it. Look to see if the PS3 is a 20GB PlayStation 3. These were available at launch only. They do not have Wi-Fi nor a flash card reader but do have four USB ports and are backwards compatible. Guide to sending your broken Playstation 3 to Sony for repair. Oscar Lee August 10, 2014. You will need the model and serial numbers of your broken Playstation 3. These numbers can be found on the bar code sticker located on the back side of your system. You can also call in using the same phone number listed above and check on the. I recieved a PS3 off my wife for christmas, it was a new 40gig UK model and the box was still sealed, I want to register my console but the serial number on top of the box has been scratched off, and the serial number sticker above the hdmi port on the back has been pulled off and there were no instructions of any sort inside the box, im a bit.