Why Does My iPhone Screen Turned Black And White After Replacing Some Parts. Here's The Possible Cause/s And Fix.
Sometimes, older devices can’t handle updates or/and repairs because this stresses the hard drive causing it to crash. Try doing a hard reset or a restore first and see if that works. But if it doesn’t, it could be one or a combination of the following: a loose connection, a defective screen, or a couple of other things causing it when you replaced the parts.