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Hi, I have a problem after replacing the touch the iPad Air crashes even when I stretch in the back the Smart Cover, I thought it was because I no longer have the original home button. But I tried to connect only non-touch lcd and no home button and the problem remains, the iPad will block even when the cover and lying in The back. I don’t know how to fix it. Everyone says that both the home button but I don’t think

Most likely the home button. Something similar happens on the iPad Air 2. It has a small patch with 4 points that you have to solder off and solder on to the new digitizer/LCD assembly. Otherwise the Smart Cover won’t work. You could troubleshoot it by disconnecting the home button and then run the Smart Cover on the back of the iPad. If it still shuts off then it could be caused by the magnets on the side under the edge next to the LCD. But as said, most likely the home button.