HDMI is a high-definition audio/video cable hookup that, unlike all other HD cables, provides audio and video in a single connection. However, if you do not have enough HDMI inputs on your TV, it is possible to use an HDMI switch. This switches the HDMI input going into the TV between two sources, such as a PlayStation 3 (PS3). If the connection is not working through, you need to troubleshoot it.
Check the HDMI cable connections running into the switcher. If any of the cables are loose you need to completely insert the cables into the hardware; otherwise, the television is not going to receive the audio/video from the PS3.
Check the connection port you have the HDMI cable running into (on the TV). Make sure it is "HDMI In," and not an HDMI "Out" port, as this will prevent signals from entering the television.
Look over the switcher box and make sure you have it set to the PS3 connection. The switcher has an "A" and "B" connection. If the PS3 is connected to "A," make sure the box control is set to "A."
Set the TV to the correct input. Press the "Input" button, then choose "HDMI." If HDMI is not chosen, the PS3 video game content does not appear on the television screen.