LG Tromm washer not draining.

I have an LG Tromm front load washer WM2277HW that will not drain. I have cleaned out the drain tubing, replaced the pump all to no avail. I had a power outage the day before the washer failed. The repair manual suggests that the main board is bad. I ordered the board from appliance pros but it is not the right board. What gives, and is the board bad?