A:AnswerMine had the same issue. Thought it was my system but the panel was dead. If you can return it, return it. If not, good luck with samsung warranty claims:(
A:AnswerAssuming you have a GPU (graphics card) that can push 120 frames/sec or you have adjusted graphic settings to reach 120 frames/sec, then yes. For $20 more the Dell S2721DGF is also a very good (I own one) option with similar specs.
A:AnswerThis may seem silly. Press the power button, then joystick button laterally toward user. I thought mine wasnt working either. This has resolved the issue for me.
A:AnswerAs you mentioned the Samsung recommended environmental range is 10-40 Celsius. Anything lower than that runs the risk of having the LCD freeze, and any batteries in the device as well, with the risk of permanent damage.
A:AnswerIt can be plugged into any desktop PC using either the Display Port or HDMI input. It does not have to be used exclusively with consoles or for gaming.