Samsung Galaxy problems? HELP?

It depends a little on which Galaxy phone you have, but it could just be that cable came unplugged inside the phone and needs to be snapped back in place. The device has to be opened for this. If it's a Galaxy device with a sliding keyboard, it could be the flex cable that runs through the slide has gone bad and needs to be replaced. Most likely though, it's probably that your LCD has gone bad, especially if it lights up. Take the phone to you carrier store and see if that have technicians who can check it out for you. As long as there isn't any signs of physical damage or liquid damage it will probably be covered under warranty and be fixable or be replaced. You could also contact Samsung and have a warranty repair through them, however, going this route you'll be out of a phone while you send your phone to them and they send you a new one. I would just got to your carrier retail location.