Answer to: Touch ID fails to setup after disassembling iPhones with iOS 10.0.2What model iPhone is this? If it is an iPhone 6, Then I would bet dollars to donuts they damaged the backplate flex cable that connects the home button to the motherboard. This cable is very sensitive in most cases your home button will still function but the touch ID will stop working if this cable has been damaged at all. Replacing the back plate with touch ID flex cable will 99% of the time correct this problem.
Answer to: Wont power up after screen repair?This issue sounds to me like you have accidentally popped the backlight fuse. This most typically happens with the iPad 4 and iPad Mini, and is caused by removing/reconnecting the digitizer and/or the LCD without first disconnecting the battery (notching a guitar pick and jamming it into the battery connection after removing the single screw is the easiest way to ensure the power is disconnected.) and creating a voltage surge in the logic board. This fuse is very fickle, and will pop very easily. Shining a bright LED flashlight on an angle at the LCD, should allow you to see the Apple logo, so you know it is indeed the backlight fuse. If you determine your issue to be the backlight fuse, you are going to have to either jump/bypass the fuse (not really recommended, but a fast fix), or replace it. There are many articles online with close up pictures to allow you to identify the faulty part.
Answer to: Digitizer freaks out when laid flat on the frameIf you are doing this as more than a hobby, then get into the habit of double-checking and re-applying the tape on EVERY iPad digitizer before you install it. It's going to take you a few tries and re-tries to get it down to a science, but once you do, the 5 minutes that you take to inspect and (if needed) re-tape the digitizers, will save you a ton of stress and going crazy AFTER the digitizer has been installed. I love my screen supplier, and they generally have very good parts, but I have found that iPad screens are very fickle, and need to be inspected/fixed before you try to install them. No exceptions!
Answer to: Anyone have better options for Digitizer adhesive?Repair professionals and basement "hacks" can be differentiated by the quality of adhesives they use. You want to use what is called VHB tape (very high bond) 3M sells VHB tapes that are approximately 10 lbs/inch which are very adequate ... but if you want the piece of mind that your repair is not going to lift or separate until the next time you are repairing their cracked screen, you want to find RED TAPE brand VHB tape, which has a bond rate of 16 lbs/inch. Just as important as the quality of tape you are using, is that the frame of the iPad/iPhone is properly prepped with 91% (or better) Isopropyl alcohol and a microfiber cloth, to remove 100% of the old adhesive residue. '''**If you are only removing 88% of the adhesive residue, you are wasting your time, you need to remove 100% of the old residue. ''' And lastly, to get the "factory" seal on your iPad repair, you need to apply a very slight pressure to the digitizer for 4-6 hours, to make sure that the adhesive remains in contact with the frame of the i...