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What normally happens when changing channels is, the screen does blank for a second or so. It may also take a little longer if you are set to various resolutions and the TV has to adjust to them. If the TV does not support the resolution, it would stay black.
This is what I think might be happening.... If you could go to Settings... Video settings, and test each resolution and rule this out.
This is what I think might be happening.... If you could go to Settings... Video settings, and test each resolution and rule this out.
