Keyboard Not Working , Lights Not Lighting Up, But Wires Work.

This question is not about ‘Razer BlackWisow Chroma’, but instead ‘Corsair K70 Vengence’. I couldn’t use that as the chosen device, however.

The cable to my keyboard had a bad connection, so I soldered it up. I tested the continuity of every pin and cable, and it’s fine. However, the keyboard won’t work — keyboard doesn’t register and LEDs don’t light up. The passthrough USB, however, works fine; I can plug a normal mouse into it and move it around on the computer as if it had been plugged into the computer normally.

And ideas as to what could be the issue?