How do you connect HDMI PS3 to a hd tv?

To use an HDMI cord on the PS3, hook up both the AV multi out cord and the HDMI cord to the TV and turn on the TV to the AV setting. Go to options-display-display options(the first one), and follow the instructions. Once you press "yes" on the confirm settings screen, swith the TV to HDMI mode and see if it works. If it does, unplug the AV out cord on both sides. If it dosen't, refer to the instruction manuals.