Bradley

Hi guys, I am relatively new to Fuji and just got my camera back from service as the battery grip was not being picked up by the camera. Now I cannot seem to take a photo that isn't black, the screen only shows an image when on f3.5 and nothing else and when I do take a photo nothing is visible except the faint light of a ceiling light, does anyone know if this is just a setting that needs to be changes or a more complex error?