Where does the HDMI cable for the playstation 3 hook up to the tv?

conect it to a computer

You plug it into your HDTV input and into your PS3. Both the PS3 and the HDTV may have settings needing adjustment. Many devices including PCs Laptops, and even Photo Frames also have outputs like the PS3 to connect to a HDTV and connecting two devices with outputs will not work.