Chosen Solution
I just finished replacing an iphone 5c screen, and checked to see if it would power on before I put the screen back fully into place. The apple logo came up and the phone powered on normally, so I shut it off and put the screen fully into place. However, the backlight seems to come on but the screen remains black with no apple logo. It still responds to charge still and vibrates but the lcd remains black. The connectors look normal and do not appear damaged in any way. I have tried hard resets and taken the phone apart several times with no avail. I have also tried other screens which produce the same result but work in other phones. I fear this may be a short in the logic board, and if it is such, is there any fix besides completely replacing the logic board?
You could have knocked off some of the components off the logic board next to the digitizer and LCD connectors. You will need to remove the black tape to inspect the logic board.
I had exactly same problem but mine iPhone had repeating charging sound (every 5 second). Same thing, after screen replacement LCD went black and unresponsive. Mine problem was in one capacitor, it was under the Shield, next to the Wi-Fi chip. After removing shorted capacitor phone turned ON normally but power button and volume up/down doesn’t work anymore. My advice is to check capacitor if you have tried everything :)
Same issue here. Black display (backlight on) however I didn’t see any apple logo. Brand new screen and undamaged.
Check your screen flex cable, does it have 3 exposed solder points? This section needs to be covered fully otherwise it can short against the metal insides of the phone. If the points are exposed then you have most likely shorted out a component on the logic board. In the past I have seen this happen with iPhone 5 screens (all though the opposite would happen where you get display but no backlight). Failing that, re-install the old screen back into the phone (or partially) to diagnose if your issue is with the screen you purchased or a logic board issue. If you have a damaged logic board then it’s extremely hard to diagnose what component could be the issue and usually even harder to fix (usually requires some super fine soldering or re-balling). Hope this helps. eman05 could be right, it’s also easy to knock components off the board where the connector for the screen is, since it’s covered by black tape, usually goes un-noticed.
This is what i noticed. I experiencing this same issue, i tried different LCDs. Aftermarket and OEM (from a brand new iPhone 5C) Both screens shows no image, but you can see that the LCD Backlight is on. When i install back the original LCD that was on the iPhone 5C (broken) It will work perfectly. iPhone 5C is running iOS 8.0 Haven’t found a solution for this issue.
Mine was same as first persons question but the phone was so dead that it would display then once screen locked if tried to unlock again would be completely black. Soft reset then screen would display until lock. So fully charged then powered on and worked fixed issue
I had the same problem, thanks to my engineering skills i had to rework (heat with a station heatgun) the Broadcom touchscreen controller and VOILA…..It worked for me…
I don’t have any answers but I’m having similar issues. I did a screen replacement a iphone 5c and now I can’t get it to turn on. It will vibrate but nothing on the screen. The old one was working just cracked screen. So I put it back on and it did the same thing. I tried holding the home and power button for 10-15 secs still nothing. I can’t lose the information that’s on it isn’t mine. The parts were new so I don’t understand why. I’ve ordered another complete set with everything . Until then does anyone have any suggestions.
Had same issue was fix was making sure lcd connector was securely in place as image would go on and off. I would press power button to make sure lcd was on and held down connector with finger until screen slid in place leaving the metal plate off Iphone working fine now with zero issues
black unresponsive screen due to defective lcd and digitizer.
