GE dishwasher

dishwasher will not drain on final cycle of any setting? It drains fine on every intermediate cycle, however, at end of sequence, tub is full of water. Replaced drain pump (it has power, and continuity) replaced main pump and motor assembly, drain valve assembly, and sequence switch. Only thing left is control board??? PLEASE HELPPPPP!!!

flapper valve is brand new!!! only thing I have’nt replaced is the control panel, and ALL wires seem to have continuity. Additionally, drain pump only gets short voltage surge during last 5 seconds of FINAL drain cycle.

I am talking about the control board on the front panel!!!

yes, I have replaced the piston and nut.