To make yours work is too costly. There are some that won't do that and are stuck asking over and over.
-> There is one last idea.
Unplug the HDMI cables from the TV and switch.
Unplug the power from the TV for 10 minutes.
Try again. Be sure the switch port has all devices on the other side powered up or the TV may not use that port.
I just bought a Samsung LED 48" TV. It only has 2 HDMI inputs, and I need at least one more. I purchased a reputable 4 in/1 out switch, but when I connect the box via HDMI cable, the TV doesn't recognize it. The "HDMI 2" selection is greyed out and when I select it, I get the error message "No connection found." The cables work when I reconfigure the peripherals to connect directly with the TV, but nothing happens when I connect the switch box.... HELP!