Black Screen - Nothing showing at all (No Signal?)

So, I just moved my Hackintosh to my new office, and plugged everything in. But nothing is showing up on the screen when I turn it on. I plugged my Macbook Pro in, and it shows up fine, so it isn't a monitor issue.

Using HDMI.

Worked on a different monitor in the previous office, so it was working yesterday.

Specs:

Z370 D3 Motherboard

Sapphire RX 580 Graphics

16GB Ram

8700 i7 CPU

submitted by /u/NormanieCapital
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