Rispondi a: iPhone won’t start with new screen but works with the old broke oneI do agree with Jacob's answer, you can try to figure it out if you have free time. said the two new lcds are defectived is impossible.
Rispondi a: Why is the bottom of my touchscreen unresponsive?I may have two possibilities for you: the first is the flex cable was damaged when you replacing a new lcd, you can try to assemble it again until you get a light clicking sound. the second is you replaced with a bad lcd. maybe you need to try another lcd, but be careful the first possibility. Hope this answer will help you.