Rathdro for Model Number LDF7774BB I have power to my LG LDF7774BB Dishwasher PCB, both fuses, line filter and PCB, are good, door lock microswitches are good. All buttons are unresponsive. There is a red LED on the board and it is not lit. Should that light be on and does that indicate a bad PCB? It's an expensive part so I want to be sure before I order it. Thanks!
Answer Rathdro, This would indicate that the Main Pcb is faulty and would need to be replaced. Read More... Answered by AppliancePartsPros.com | Tuesday, February 3, 2026