Are you talking about a computer desktop monitor?
A couple days ago I just got my PC back from best buy after installing a new motherboard and CPU and ive had nothing but problems like times when I would leave my computer for 15 minutes and have to come back to it and it would say HDMI not connected so then I would have to restart my PC by pulling out the plug since that was the only way to turn it off then put it back on then it would work. Another problem with it is it will not shut off when I turn it off thrue the monitor. All the fans and lights are still on and I have to unplug it like the last problem. I'm just asking if anyone knows the answer to any of these problems please help.

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