== added Question, please Help!==
I currently have the same problem with the black screen and charging sound every 8 seconds. However, when I first assembled I was able to see the screen until placing the screen all the way down and it went back to black.
I also ripped the Thermal Plate Copper Shielding Tape that connects the front facing camera. If this is disconnected will the iphone stay black? I tried scraping away at the tape to reconnect Copper connection but think I failed at this, I see you can buy the replacement copper tape but would this even be the same cause as the black LCD screen?
Thanks