Just diasembled this broken Xperia Z1 with a New lcd display. The module based architecture of this peace made it simple. Keep in mindre that you break the guaranty and that the glue might hve to be replaced if you are too eager disasembling it.
Check out this great video which I used for reference https://youtu.be/SvJKVxfKqFc
Pop off the back panel:
Unscrew the 9(?) screws:
Remove the battery, the camera, and the mainboard(s) at top and bottom:
And there you have it disasembeled:
Then, reverse every step with the new display and hope for it to start up flawlessly.