Second Display port not working

MrMellowMan

Honorable
Oct 17, 2013
17
0
10,510
Graphics card: PowerColor Radeon R9 280x

I am running VGA to D-SUB converters for my monitors.
If I only plug one into the second port, this happens.
The second port seems to be giving some sort of a signal because if I unplug it, the monitor says "check connection, no signal detected"
However nothing shows up, it just gives me a black screen and the monitor sits there as if it is in sleep mode. And yes, I press keys and move the mouse and nothing comes up.

If I plug in two monitors, the second one, plugged into the second port, is not detected at all.

The first port works just fine.

I am wondering if it seems to be faulty hardware, or am I just missing something here?
Any help is appreciated, thank you!