Dell Docking station stopped working

I have a Dell Latitude running Leap 42.3 which has been working fine until I got into work this morning and plugged it into my docking station with dual monitors. It seemed to boot up okay and I could see the splashscreen and login, but then the monitors just go off. If I lift the lid on my laptop 2mm I can see that its switched back to using Laptop display instead of the monitors through my Docking station. This normally works fine and I can move between docked and non docked with ease until this morning, not sure what has changed?

Maybe a bad switch??