black screen and makes sounds
so my iPhone 4 has a black screen but was still on and working. i plugged it into my mac and I tried pushing the on/off and the home button for about a minute and no apple logo showed stayed black but wasn't making any sounds anymore. so then i let the batter drain. and then i plugged it back in to restore it and i did restore but still with a black screen. it was also making sounds every 5 seconds and still is now. Please help. how do i fix the black screen and make the noise stop.