The prototype needs a modification before it will function.
The panel needs to be fixed using a ribbon cable.
Sadly the lights are not working in the nearby equipment room.
There is, however, another equipment room on the first floor.
This can be reached with the brass key and the 'first' button in the foyer.
You will need to turn on the lights.
Once you have the cable, you need to return the the Deutsch lab.
Then 'fix prototype' or 'complete modifications' or 'attatch cable to
panel' or ...
Now set the control panel to an appropriate number and press the silver