Chosen Solution
After replacing my IPhone 5S display, it started booting with a white screen After a reboot it just stayed black, i can just see the back-light turning on. I tripple-checked the connections, but nothing helped.
Hi It was a faulty display Managed it to boot, but the screen kept turning white in some angles( especially with a closed phone) so probably a cable is broken.
I’ve got this issue too, but i disassembled the phone n reassembled carefully to fix 1 of 3 issues i had n 1 worked but 2 needed software reinstallation. i think sometimes the phone does detect authenticity n as such gets a boot loop for incompatible screen type
