Quoted from Knxwledge:Is your solenoid driver board new too? Maybe could be an issue with the 5v regulator on it if it's an original board
Agreed, Sea_Wolf, post a pic of the Solenoid Driver/Voltage Regulator board.
Also, have you reseated the socketed IC's on the MPU board? Support the board if pressing on the IC's in an installed board.