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Is it plugged into your graphics card? I had this same problem cuz It was plugged into my motherboard. found out my graphics card doesn’t support vga. So I had to get a vga to hdmi adapter.
Sorry, there was a problem. Please try again later.We would recommend checking the input on the HP 21kd 20.7-inch Monitor. Page 12 of the user guide shows you the OSD (On Screen Display) menu options. Page 11 shows you what the buttons on the front of the monitor do. Select the Menu button (far left button), then use the Function buttons (middle buttons) to move to the "Input Signal" option. The default input would be DVI. So, you may need to select VGA. Here is the user guide: http://h10032.www1.hp.com/ctg/Manual/c04991775 If you need further assistance, visit https://support.hp.com
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