A simple solution to your question will be that you have to first turn off the camera and then proceed to remove the battery and memory card from the camera's hardware. After waiting a few seconds, reinsert both components and restart your camera and then make sure your camera is set to Auto Mode. Press on the shutter button to ensure your flash is producing a flash. If it is not, then you may need to charge the battery to your camera. Hope it helps

Your answer may lie in the simple hidden feature of your camera's settings. Go into your camera's settings and make sure your brightness is at an appropriate setting. If this isn't the case, you may need to remove the battery and memory card from the camera and hook it up to a computer via its USB to ensure the screen is properly working. If none of these solutions work, then you may potentially have a damaged LCD screen.