Replaced Main Board - Freezer still doesn't work.. What now?

GE Profile Arctica Side-by-side - The freezer compartment was not holding temp and would fluctuate between -3 and 15 degrees. Fridge seemed to be fine with temp. Also, ice maker would not produce ice. We replaced the main board and the water valve in the rear of the unit. This has not helped. The freezer is still going wild with temps and still no ice. I’m not sure what to do now as most of the suggestions I read recommended the board be replaced. Hoping someone has some ideas.

hgrays