iPhone 5s won't switch on
My iPhone 5s turned itself off and then showed the cable into iTunes symbol, so I connected it by USB into my laptop and my laptop showed a message saying "In order to reset your phone you need to get it out of recovery mode", then my laptop started updated my phone and just before the update had been completed a message showed on my laptop saying that "It could not proceed to finish the update due to loss of internet connection." Since then my phone is just showing a black screen and won't turn on. Please help.
iPhone 5s