With the camera off, hook your camera to the TV's HDMI input and select the correct input from your TV menu. Then turn On your camera. Sometimes the two devices need to "handshake" which is basically them communicating. If you connect your camera when it's already on, it may not be sending the signal to the TV for it to communicate.
Other than that, just make sure you have the camcorder set to Playback mode.
I recently purchased a full HD video camera.(Sony HDRXR100E AVCHD HDD Handycam, 80GB)
I tried to connect it to my HD ready tv (Panasonic TH-42PX80B) as per the instructions using hdmi mini cable. Result is a frozen green, pixelated screen.
Hoping someone out there can tell me what I am doing wrong. I changed the output settings on the camera and tried all 3 hdmi inputs on the tv, same result. Advice would be appreciaited. Thanks a lot.