Chosen Solution
Hi really hoping someone here can help! I have replaced the screen on my iPhone 7 last night and at first it wasn’t working but after a reboot it was fine. However I realised I had done the home button wrong and it wasn’t sitting flush, this was annoying me so I opened it up this morning to change this. Turned it off first and didn’t touch the screen connections. When it was done I tried to turn the phone on but am now getting no display. Please help me fix this its driving me crazy!
Based on your feedback, you either damaged the screen or the image/backlight circuit on the board. Screen could have been damaged mostly if the cables got damaged when re-opening the iPhone. Or at board level you may have damaged the image circuit or the backlight circuit (most likely). Connect to a computer and see if the iPhone is identified in iTunes to confirm that it is turning on. Pay special attention if iTunes says the iPhone needs restoring; in which case it may be in DFU mode (which shows no display) and need updating or restoring first. Trying a new screen on (or the old one had it been still available) will confirm or rule out a bad screen. If all above fails, you’ll need to troubleshoot backlight and display circuits on the board. Micro-soldering tools and skill will be needed for that.
