Try this, turn the camera to TV mode and set time to 15 seconds. Take a picture and after about 7 seconds open the battery cover to break contact from power, close the battery door and if the camera does not start up on its own turn it on. you may have to do this upto about 5 times or so before the screen will work but eventually it will. this fix is temporary and to make it permanent you need to take a couple of hundred photos, its worth a try