Chosen Solution
After one screen break, I watched YouTube at home (I did not know ifix at that time). After a few months after the repair was successful, I felt that the battery could not function properly and replaced it. However, after replacing the battery, I covered the liquid crystal again and a black line appeared, so I assembled again and I heard only the sound and the screen did not turn on. I want to solve this phenomenon, but it seems to be selling the part in ifix. What part would solve my problem? I have about 10 repair experience, but I do not even know what parts I need to buy in case of a breakdown. I also apologize in advance for the lack of English language skills and the lack of sophistication in terms of word order and vocabulary
If you take the iPhone apart again ,and try taking out the battery for a few minutes. After a few minutes is over put the battery back in if it continues to not work try replacing your LCD, digitizer and or the whole display.
如果再次拆开iPhone，请尝试取出电池几分钟。几分钟结束后，如果电池继续不工作，请将电池放回原位，尝试更换LCD，数字转换器和/或整个显示器。
Si vuelve a desmontar el iPhone, intente quitar la batería durante unos minutos. Después de unos minutos, si la batería sigue sin funcionar, vuelva a colocarla en su lugar e intente reemplazar la pantalla LCD, el digitalizador y / o toda la pantalla.
So it seems like you should replace you’r screen. Before you do that make sure that the connector from the battery is properly connected.
It’s very important to always disconnect the battery before disconnecting/reconnecting the screen assembly. The issue is that the LCD connector has pins that have high voltages (i.e. the backlight is ~20V) and ground in very close proximity. When you fumble around trying to line up the connector plug to the receptacle, you can short out the voltage rail and cause damage to the components in the backlight circuit. If you’re lucky, then only a backlight filter is damaged but other times, the entire circuit could be affected. Either way, this type of repair requires micro-soldering and isn’t really a DIY repair. To test for this, plug your device into a charger or an iTunes enabled computer. Then shine a bright flashlight on the screen. If you can see a dim image, then the backlight circuit has been damaged. If you can’t see an image at all, then it may be the LCD circuit that is damaged. You can connect the original, cracked screen to confirm this. If the original screen has the backlight on, then the replacement screen has an issue. If the original screen also doesn’t show the backlight, then the backlight circuit is blown. If iTunes doesn’t recognized the device than the problem is more than just a screen or backlight issue.
