Help with PS3 - No Video or Audio!?

The display settings are simply not set for the T.V's you have tried to use your PlayStation 3 set on, they would still be set for the T.V at your home. To correct this, once you have plugged your PS3 into whatever T.V you will be using, turn it on then hold your finger on the power on for approximately 5 seconds, you should hear a beep after holding it long enough, the PS3 will reboot and then it should display a picture and sound. Also make sure you have the connections in firmly otherwise it still might not display.