My iPhone 5C screen did not turn on

So I bought this 16GB iPhone 5c, it worked fine until lately. The screen suddenly turned off and won't turn back on.

The phone is 16GB and the last time I checked it still has 5GB+ of memory free. It is running iOS 7.0.4. I have been charging it with the charger that the phone came with in the box.

The screen is black, not the lit black, just jet black. I tried holding onto the home button and siri did work, so I believe it's not a software problem(?).

When I tried unlocking the phone, it worked (touchscreen did work) and when I pressed the power button to put the phone into sleep, there's the noise. The volume buttons and mute switch also worked.

I tried restarting the phone by holding the home and power button at the same time for 10-20 seconds to no avail. Te display is still not on.

I connected the phone to itunes to see if it will be detected, and yes it was detected. It says that my battery was 100% so it is probably not the battery either. Everything but the display seemed to be working just fine. My iphone also received notifications since I heard the noise of incoming messages as well.