Chosen Solution

I replaced my screen with an iPhone 6s screen form ifixit, but now it won’t turn on. The old screen works fine, but the screen I got will only show the apple logo repeatedly until I turn it off again. The logo is white and the screen is black when I try to turn it on. Does anyone know what is wrong?

From what you have said it seems like a broken screen. If the old one works, but the new one doesn’t, then it would seem to be the screen. You said you bought it from iFixit. In that case, it would be covered by their lifetime warranty. Contact them and get a new screen. Although, I cannot think why the phone won’t boot (only showing the apple logo) with only one screen.

If the apple logo is flashing on and off repeatedly, put the phone in recovery mode and select “Restore” this will erase any data on your phone, so have a backup ready. I don’t know if this will work, as the old screen does, use this as a last resort.