I bought a second hand iPhone 5s for christmas and can't get it to power on. Left it plugged in for over an hour but the battery icon or apple icon didn't come up on the screen. I tried forcing the restart by holding down the home and power button and flicking the mute button a few times. Also tried connecting it to my laptop and it still won't connect or turn on. Does anyone know any other little tricks that may get it powered on? Driving me nuts!