I was given an Iphone 5S that had it's front screen completely shattered and the battery was also damaged. I ordered a new Battery and screen. I received the battery and proceeded to install it. I attached the charging cable to the Iphone prior to installing a new screen. The computer did recognize the Iphone initially, but now it does not. Should the computer recognize the iphone without a screen attached or does it need the screen on it. Just wondering if the Iphone it not going to work again and it maybe pointless attaching a new screen. Thanks for any advice.