There's four momentary solenoid select signals from the MPU board to the SDB. These are signals PB0, PB1, PB2 and PB3 which come from pins 4, 3, 2, 1 respectively on J4 of the MPU board and go to pins 6, 5, 4, 3 respectively at J4 of the SDB.
From the Solenoid Driver Board (SDB) schematic around the 74L154 chip, below are the four PB0, PB1, PB2 and PB3 signal states and which solenoid the combination of states select. The four digits in the leftmost column are binary numbers - "0" means zero volts, "1" means 5 volts.
One of these four signals is not reaching the SDB circuit. The solenoids listed on the left are what should activate, the incorrect solenoids on the right are what you are probably getting based on the partial detail you gave.
The PB0 signal isn't getting from the MPU board to the SDB and the SDB is always seeing PB0 as a "1". This results in the SDB incorrectly activating the same slingshot coil for each slingshot side switches, and ditto with the pop bumpers.
This is a Blue-Yellow wire from the MPU board J4 pin 4 to the SDB J4 pin 6
Flight2000_SolenoidOrder1.gif