Disconnect all wires from the main PCB assembly:

The photocell wire connector labeled CN3 on the board

The white wire connector labeled CN2 on the board

The orange wire labeled MOTOR1 on the board

The igniter wire connector labeled CN1 on the board

The yellow wire labeled ACIN1 Yellow on the board

The white wire labeled ACIN2 White on the board

The red wire labeled MOTOR2 Red on the board.