My IPhone 4 does not turn on

I was playing some game on my IPhone and i'm sure it had at least 50% battery left and I was charging my phone while playing the game. It just switched off by itself and is now in a black screen. I have tried connecting it to ITunes but it does not recognize my phone. I've tried holding the power button and home button simultaneously for more than a minute but that doesn't work too.i've tried putting it into DFU mode but it doesn't work. The Apple Logo doesn't even show. When i charge it there's no sign that shows that it is charging. Can someone help please?!

Added (1). Itunes doesn't even show that my device has connected.like… The bar above Genius. There's supposed to be your iphone bar thingy but mine doesn't show up. I have the latest version of itunes

Put the phone in dfu mode and then reset it using itunes

  • Why does iPhone not have the option to require a password to turn the phone off? When someone steals your iPhone, the first thing they do is turn it off, not allowing you to use the GPS function to search for the phone. This means you have 0 time to get a rough idea of where your phone is, as this may still be very useful in tracking your phone. Is it because: 1. They not thought of the idea 2. Apple wants stolen phones in order to increase sales 3. It's a stupid and pointless idea to begin with
  • Why did my iphone 5 turn off and not turn on after a ios 6 update? I have tried everything it won't show its charging i tried holding down the power and home button but that won't work, the screen is just black and won't do anything. I even tried plugging it into my laptop and that won't work either How do i put it in DFU? I hook it up to my comp and nothing happens at all. Nothing pops up on my comp and my phone won't turn on at all
  • My lock button does not work and my iphone 4 won't turn on My lock button does not work. And my iPhone randomly turned off. I tried pressing the lock button as hard as I can, but it still won't turn on. Before my phone turned off it was 73% . I tried plugging it into my laptop and I had no success. Are there any ways for it to turn on? Please and thank you. I also don't have time to go to the apple store.
  • My iPhone 4s does not turn on i have replaced the screen dock connector and battery? My iphone 4s 32gb does not turn on it is completely dead no water damaged all the indicators are white i have replaced the screen dock connector and battery all the connections are fine but still completely dead i have left it on charge for 2 days now but still dead when i connect it to my laptop nothing happens it is completely dead.