Try component or even old composite connections.
I have a Sharp LCD TV LC-60E88UN. Whether I am viewing a DVR show or a DVD movie there is a quick flicker about every 5 minutes. It looks like it might be a 1/10 second shot of a scene from earlier in the recording. Just lately sometimes half the screen freezes completely while the other half shows the ongoing recording.
I tried hooking the hdmi cable directly into the TV to be sure it wasn't my receiver that had the problem. That didn't help.
I tried disconnecting the hdmi cable but the problem was still there when I reconnected it.
The only thing that got rid of the frozen screen was to turn the TV off and then turn it back on. So I'm assuming this is a TV issue?
What part do I need to replace? There is no service center anywhere near me.