Sixth iteration of Apple iPhone, announced on September 12, 2012. Repair of this device is similar to the previous models, requiring screwdrivers and prying tools. Available as GSM or CDMA / 16, 32, or 64 GB / Black or White.

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Screen is black after LCD replacement

Hi guys,

After LCD replacement my iPhone does not show any picture on the screen. When it is connected to a computer it constantly vibrates every 10 seconds or so. I have cleaned connectors on logic board and LCD already, I have also tried hard reset but without success. Now I am suspecting backlight filters since previous LCD does not have piece of tape on backlight flex contacts therefore I assume it shorted. I do not have multimeter at the moment to check continuity of the filters but I took some pictures. To me they look fine because mostly dead filter I have seen look kind of brow]nish. Also could you please tell me what is that capacitor responsible for in the left corner. It looks weird on one side. Thank you in advance.

https://www.dropbox.com/s/ge6wmrpsyg0b5i...

https://www.dropbox.com/s/zo0jrnjaz36n4l...

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It was C351 capacitor which is damaged. I have replaced it and the picture on the screen is back.

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Deck the Halls
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The missing tape on the 3 solder points for the backlight on the screen don't necessarily cause issues with the phone. Because I have done many screen replacements with or without the tape.

Also for the constant soft-rebooting issue that is most likely caused by either a damaged LCD flex cable or a faulty screen.

I would get the screen replaced under warranty where you purchased it from.

Also a blown backlight circuit does not cause this it would only cause at worst screen no backlight but with display.

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