So as the title says, I have an iPhone 5s that won't boot up. When I press the power button it gives the dead battery icon, so I plug it in to the charger and it tries to boot, then fails to start. It cycles in this dead battery/start screen multiple times and then flashes the red screen, blue screen, or a roller coaster tycoon style sand yellow screen over the apple logo. It went into this while trying to update and the iPhone was a warranty replacement from Apple from around a year ago. So has anyone had experience with this? Any genius experience? I brought it to the Genius Bar and the woman helping wasn't exactly the brightest, she just kinda looked at it and didn't say all that much other than $270 to replace it. So if possible any suggestions or experiences would be helpful. Thank you!