Alright, I got it to boot!! So now I'm messing with the memory sticks because that seems to be the issue.
Boots fine with 1 stick, but not 2. And it doesn't matter which 1 I use or the slot it's in.
@ToolPackinMama yes. And instead of just swapping two out and switching slots, I just used one stick and 3 of the 4 slots don't work.
So that was a headache but at least I got it figured out.
@dr_zooks Have you tried swapping sticks?