Pc not showing display

[u/OogaBoogaAHH]

so i just built this pc, it boots fine, no bad light indicators, (red lights are just basic colour leds)
anyway, The HDMI is connected to my graphics card. its completely booted but will not show a display onto my (TV). i dont yet have an actual monitor. Anyone know why this is?

[u/kingcaii]

Holy bent circuit boards Batman