Chosen Solution
I have an iPhone 6 that the screen was cracked. When i replaced it the new screen light but no image. I tried another screen and got the same results. I tried unplugging the battery and also tried doing a hard reboot but had no luck. If i put the cracked screen back in it works. Any suggestions
You likely have a bad replacement screen(s). Were they both from the same vendor and batch? Do you buy premium replacement screens or low cost models? If your original cracked screen works, then you do not have a problem with the logic board. Try another known-good screen or order a high quality one from a reputable supplier like iFixit.
