Iphone 5 won't start stuck on apple logo
Suddenly my 19 month ol iphone 5 won't start and stuck on apple logo I tried hard restart holding upper left key and home button at same time , DFU mode , charging etc. but it just keeps restarting even though I don't touch it and shows blue/gray screen with and without logo. Any help would be really appriciated.
iPhone 5, iOS 7.0.6