The 2Q includes 2 internal fuses, one for power and the second for the Opto relay output.
- Remove all 8 M10 screws from the front and back covers
- open case and remove the flush mount screw using a 9/64 hex key that holds on the daughter board
- gently pry the daughter board off the main board
- Remove the 2 fuses and test.
See pics for clarification