Alan McConnell composed on 2016-03-26 12:11 (UTC-0400):
I am using a PS2 keyboard, I believe. A white cable from the keyboard back into the top orifice at the back of my standard case.
*If* your motherboard has two round ports, stacked or side by side depending on your orientation, it's time to take another look at your motherboard's manual, in particular, the "Back Panel Quick Guide" or similar that depicts the rear view of the ports. You should see labels on the left end for the round PS/2 ports. The upper is for a mouse. The lower is for the keyboard. The actual mouse port should be green in color, the keyboard port purple. Operating systems may not care which port you plug a keyboard into, but the BIOS does. Most BIOS show an error message in POST if the keyboard is plugged into the purple port, especially if you have a mouse plugged into the other round port. What color is your motherboard's "top orifice"?
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