Monitor wont detect input after Graphics card upgrade.

[LightningsalesUK]

I have 2 monitors for my system and I upgraded my GPU however one of the monitors is not detecting an output, I have checked the connections and re-plugged them. still nothing. The monitor worked before the GPU change fine.

 

[Corwin65]

What GPU did you upgrade from/to.

What connection are you using for your monitor?

 

[LightningsalesUK]

What GPU did you upgrade from/to.

What connection are you using for your monitor?

I sold my GTX980ti and the monitor then was using DP, then I sold it and used a GT710 as a placeholder using HDMI until my GTX1070 arrived, now I have the GTX1070 the DP won't work.