Don't know. The only thing that I can see wrong is the bottom of the board should be in front of the little white triangles where the screws are.
There are 7 white slots directly below the dial. There are 7 long gold pins that go through the holes. These pins provide power and data from the back board to the display board.
How To: Replace an AquaRite Display PCB - YouTube
The display board sometimes has extra holes where the pins can go through that make it easy to misalign the board.
Make sure that one pin goes through each white slot.
It looks like you reused the little plastic leg covers. Just leave those out.
Ok - I will do that. I thought they were important as all the other videos online show these leg covers. I will remove and resaulder and let you know.
**** day job...