Swapped MB, CPU, RAM. No display but the computer runs. Video inside.

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Jan 20, 2018
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510
MB: ASUS Z270M-Plus

CPU: i5-7600k

GPU: GTX970

RAM: BALLISTIX Elite DDR4

PSU: NZXT 550W - HALE82-V2

I've double checked all connectors. I've taken one stick of RAM out and turned it on. Turns on but still no display. Taken GPU out and plugged DVI-Dual and HDMI into motherboard. Still no display.

The computer continues to run. No beep codes, no sounds. All fans running. Just no display. The last thing I can think of is to just re-seat the CPU.

https://youtu.be/hDLazMZ0x5g

I've only replaced the MB, CPU, and RAM. Not the GPU. I just swapped out those three things. I'm out of ideas. Everything is plugged in, I'm sure. What kind of steps should I take one by one to diagnose this?? I'm about to take it all apart and try again.