Thanks for your question. The TV can in fact accept 60Hz signals, as that is the industry standard. But I think you're looking at this problem the wrong way. If the TV works fine with all the devices, why do you think there's a problem with the TV? Have you tried the home theater on another TV and it works just fine? It seems like the problem is localized to the home theater.
I'm trying to connect the TV to the AV receiver. The wires are good, I can see the AV setup on the TV. however any attempt to display video (Cable, DVD) I can see some flickering and the no image. The TV and the cable are fine with direct HDMI connection to these devices. I think that the TV cannot accept 60Hz. Perhaps there is a synch issue that I cannot figure out how to make it work, I tried all the HDMI connection on the TV just in case.