The rectifier board looks like it has come up well. With the solenoids not firing, you could check that you have 43vdc between one of the coils legs and a ground point. This will confirm the rectifier board is working fine and the connectors are good. The spare transistors, diodes, resistors are useful if you have a 1-2 of coils not firing or are locked on but since you have most of the coils not firing there might be another cause. Sometimes dry joints on the back of the J4 solenoid board heades or in the plug itself will cause this problem. Also worth checking is J4 connector on the MPU board, that there is no corrosion around here. Hope this helps.
regards Derek
