Iphone 5 black screen problem

Today my iphone 5 screen is black won't turn on i've tried the hard reset and soft. It died lastnight and i went to go charge it and when i woke up it wouldnt turn on no apple logo at all but it did go to a grey screen later when i was pushing the home and power button and went back to black when i pushed one of them again. The weird thing is when i would hold the home button it would make the siri sound but i wouldnt see nothing just hear that sound but now it won't even do that, now it won't even charge, could it of been messed up by the electrical socket or got messed when trying to reboot when charging if anyone knows anything ican do it would help alot thanks.

Sounds like a manufacturing problem. Send it in for repairs, or get a new one since it's probably still under warranty. If not sell it to someone who thinks they can fix it and buy a new one.

I had same problem when my iphone 4s was on ios 6.0.

so i have updated ios 6.0 to ios 6.1 but still app store updates are showing blank screen