Chosen Solution
my phone was black out after an app was crashed. phone worked but only screen was black. i did restore it on itunes but screen was still black. i thought screen is wrong so i replaced it. but it doesn’t show anything on it. even the screen i replaced from my phone worked well on other iphone6 when i assembled it to other iphone 6. i don’t think it’s screen problems. is motherboard problem? but phone still works and when i restored it on itunes, i succeeded it.
It appears you have a damaged backlight circuit. Did this problem coincide with a repair? If you don’t disconnect the battery before removing a screen assembly, there is a risk you blow the backlight filter or more. This requires a micro-soldering repair and is not DIY. I would recommend that you find a reputable shop that specializes in micro-soldering repair.
