Question Stuck in Power Cycle after installing used CPU/MB

Dec 25, 2020
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So I'm out of ideas...

I bought a used CPU [i7-9700k] and a used Motherboard [B365M D3SH] from Amazon the other day, got them all hooked up to the best of my ability, even had some of my computer friends discord call me to make sure I didn't mess anything up. But when it booted, it got stuck in the infamous boot cycle. Couldn't even make it to the bios logo before it would auto shut off and restart, looping it in a boot cycle that never ends. I tried removing 1 ram stick [2x8GB Vengence DDR4] and that didnt change anything. I gave up eventually and switched back to my old motherboard [MSI MiniATX] and my [i5-6600k] and NOW, NO DISPLAY AT ALL but all my fans and lights are working. I'm completely stumped at this point. My guess, is my graphics card was short circuited by the faulty motherboard... Can anyone help me figure this out?

Current rig:
Asus 6gb 1060
I5-6600k
1tb hdd
500ssd
Cooler master cpu cooler
Cx600 psus
Vengence ddr4 2x8gb