Hello, I have a business of repairing iPhones. And I was taking my iPhone 4S (Verizon) apart for practice. I got all the way to taking off the speaker module, then I felt as I just needed to put it back on. Once I put everything back on. I turned on. It only turns on if charged, there is no backlight or screen, and it vibrates in a pattern: dun dun - dun dun - dun dun, etc. and it keeps going and gets warm. I need to fix this ASAP. I checked over at least 5 times in this 4 hour process taking apart & putting back together. I'm so stressed. PLEASE HELP. Thank you. As of right now, no way for contact except my laptop. You guys are my best bet!