Was my iPhone 6s replacement display assembly bad?
I installed a new battery and a new display assembly on my son's phone last night. I've done this type of repair numerous times over the year and without issue. But last night was the worst experience yet. I did everything textbook. But when I got the phone back together, it wouldn't turn on. I didn't know if it was the battery or the display. So I charged it for a little bit and still nothing. So, took the display off and put the old broken one back on, and I could see that it was on, and that the battery was at 4%. So I deduced that something wasn't right with the display. So, I took it off and on several times and somehow it started working! However the upper left hand corner was sort of dark. My son told me it was fine, so I didn't worry about it (though I was disappointed). The phone was behaving somewhat sluggish so I restarted it. It never came back on. So I took it apart again, checked everything and it seemed fine. But in messing with the display cables so many times, I ended up ripping one of them and ruined it. I'm so upside down on this phone now its not even funny and very discouraged. I guess my question (not that it matters now) was do you think the display was bad? Thank you!