ipad pro 12.9 no touch (tecnician error) - TDR - National Repair Center
After a technician at another company was done with a screen repair he noticed that there is no touch on the the new screen. It was noticed that the Fuse/Filter was burnt. Due to not having properly de-powering the device.
As you can see the fuse is blown and needs replacement. Micro soldering arounf the FPC connector can be difficult not to damage the connector. However with proper heat The fuse was replaced, initially thought to be a capacitor, after finding proper schematics it is actually a fuse. .3 OHM to be exact.
Is this a boobie trap made by Apple? Yes, we believe so, this can be easily mitigated in a hardware world where you do not need to disconnect a battery for a screen replacement.