Things You'll Need
Instructions
Power up your PS3 console if it isn't already turned on.
Connect your PS3 to the Internet, if necessary. The connection options are available in the XMB menu under "Settings," then "Network Settings" and "Internet Connection Settings." You can connect via an Ethernet cable or a wireless network.
Navigate horizontally to the "Game" section of the XMB menu.
Navigate vertically within the Game section to the "Trophy Collection" option.
Select the "Trophy Collection" with the "X" button. Before displaying your trophies, your PS3 will sync them up with the PSN. If you prefer, you can manually synchronize your trophies by pressing the "green arrow" button with the "Trophy Collection" option highlighted; then select "Sync with Server."