Trying to get anything to appear on the screen. When I hit the power button the "M" and "back" led's light up at the bottom and go off within seconds. If I hold the power button the led's stay lit and you can see a wave of light go from top to bottom but nothing ever comes on the screen then the led's go out when I let go of the power button. I've tried pressing the power and home buttons at the same time but nothing happens except for the wave of light. I've pressed the reset button as well with nothing happening. Is this a screen issue? Any ideas?