Anchal mentioned that one of the lasers is not functional. I checked what's the situation.

• The combination of the south laser and the controller (upper) works well.
• The combination of the north laser and the controller (lower) does not work.
• The combination of the north laser and the controller (upper) does work.
• The combination of the south laser and the controller (lower) does not work.

The conclusion is that the lower NPRO controller is broken. It is labeled as the attached photo.