iphone 5s unable to turn on even trying the hard reset

my iphones 5s is working perfectly until when i am about to use it again there is no display. thinking the battery is empty i chrage it to lapton then connected to itunes. on the itunes my battery is showing 100%. so i tried making the hard reset, pressing the power and home button at the same time, but still it cannot open. can you please advise the solution to the problem.