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Nov 17, 2015 · The 55H6400 is a mid-range 55-inch LCD TV boasting edge LED lighting and Samsung’s current (non-Tizen) Smart TV system. It also provides 3D playback with two pairs of free glasses, and. Hello! I have Dell computer. My Samsung smart tv UE55H6500 is connected with it through hdmi cable. Sometimes I use my tv as a display instead of my Dell monitor. Now I can't anymore and I don't know why. I have another tv, Samsung UE48H6400. When I connect it with my computer (same computer, sa.