Hi I have been having a similar issue with my iPad Pro 10.5 that also has a slight curve to the frame. I took it to the genius bar and they told me that they could only sell me a replacement for $400+. I saw videos showing a NAND removal and resoldering and also noticed that the iPad would sometimes boot up if I applied a bit of pressure to the case (slight twisting motion… don’t ask). I opened it and noticed that if I apply pressure to the strip covering the logic board while starting the unit, it boots up just fine… weird. It shuts right off if I remove pressure from the logic board enclosure… any ideas?