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Had a customer bring a phone back after a charging port replacement. Said the volume wasnt working or the home button. Taken the screen off, put it back on and the screen will now not come on. I have tested the screen on another iPhone SE and works fine. The mute button works as the phone vibrates. What can this be? Need help asap please
Did you disconnect the battery? Please do so every time you work on your iphone. Maybe that would do the trick. As you said the screen works on a other iphone. Does the other screen works on that that one? Please exclude things. Like backlight working? Try to look hard if you see an image. Connectors are clean?
Did you disconnect the battery before removing the screen? If not, you may have damaged the backlight circuit on the logic board. Connect the phone to an iTunes enabled computer and shine a bright light on the screen. If you see a dim image, then the backlight circuit is damaged. It could just be the backlight filter but there could be more damage upstream as well.
It sounds like your phone is on, otherwise the vibrate switch would not be giving you a response. You need to determine it indeed you have no display at all, or if your phone has display out put, but no backlight. Unplug the battery and plug back in. Clean the screen thoroughly to remove any fingerprints. With the phone held under a very bright light connect a charger to prompt the phone to boot up. If you are able to see a very faint Apple logo than this is a backlight issue, not a display issue. You will need a microscope to inspect the components near the display connector to see if a filter is blown. It also would be a good idea to look under the screw holes surrounding he lcd connector for long-screw-damage. This would appear as a crescent shaped bright copper scratch on the nearly-black surface of the motherboard.
