A:AnswerHi and thanks for your question! The HP 24F has a slightly faster response time with 75mHz instead of the 70mHz found on this model. The HP 24F is located here at Best Buy as well.
A:AnswerDisconnect the power then press the power button for approx 45 seconds. Release the button then replace the power supply and try to turn they power back on.
A:AnswerI just hooked an M24f up to an old Lenovo without a problem, but I used VGA not HDMI. It flashes for a second Input not found, but then connects no problem. Maybe it is trying to connect via VGA?
A:AnswerThank you for the question. You can change the refresh rate in display settings: Choose Apple menu > System Preferences, then click Displays. Click the Refresh Rate pop-up menu and choose a refresh rate.