No warranty. When it was working, there was a very short warm up time. It used to show the input it was on in the upper right hand corner after the short warm up. If you look at the back you can see light coming into the screen, it act's like it's not getting the input from a card to make it show anything on the screen. The only reason I don't think it's a HDMI cable is, with a bad cable it should show no signal in the bottom left corner as if the tv was the only thing on. If I just leave it turned on all the time it's not a problem, the picture comes right up when the DVR is turn on

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