[Mark McLeod]

Thanks for the follow-up.

A mild short on one of the 24v lines, one of the connectors, or in the cRIO or solenoid breakout will do what you describe.
The 4-slot cRIO will work down to 9v, so the short wouldn't have been obvious if if hadn't been a 24v solenoid.

If you want to track it down further now that you have a working setup you can do a simple part swap to isolate the culprit. Leave all the working parts connected and your multimeter running, while testing single components one at a time by connecting them.
Whatever is the same from the old setup has been pretty much eliminated. If the 24v PD/cRIO/Solenoid module connectors and wires are the same in both setups, then it'd point to whatever was taken out. The cRIO itself, the solenoid module or breakout depending on what has been replaced.