1. Disconnect all HDMI sources from the inputs.
2. Unplug the power from TV/LCD for 10 minutes.
3. Plug the TV/LCD back in.
4. Connect the HDMI cable one device at a time.
5. Turn on the device (ex. PS3).
6. Repeat steps 4-5 for each HDMI port.
Let me know if this doesn't work and we will continue to troubleshoot your issue.