Euuugh. That's a tangled web. Technically, the 4.2.7 board is supposed to be a simple swap in, but I'm seeing an awful lot of posts where that hasn't worked, and firmware twiddling was required. This feels like a firmware issue, but it's going to be difficult to diagnose as there are so many potential Ender 3Pro variants out there.

What happens if you chuck the original board back in. Does it still do the raise, stop, raise, behaviour? That might at least get you printing again.

I assume that your E3D pro doesn't have a touch screen?Do you know if it has a transfer board installed or not? (see point 8, here - https://howchoo.com/ender3/install-b...ender-3-v2-pro). It shouldn't affect anything if there's no BL Touch, but any information is good.

And yes, this forum software is bad.