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Repair information and guides for the iPhone 6S released by Apple on September 25, 2015. Models: A1688, A1633

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Repair after water damage, diplsay not turning on

I have a iPhone 6s with water damage, it was shorted on a cap C2122 & C2123, and also L4000 is burned. After removing the damaged components the phone seems to be booting and is reckognized by iTunes. But I have no display on the phone, also tried with a new lcd panel, no luck. What could be my next step? I'm only trying to salvage the data from the phone, but it was only trusted on my old laptop, so I can't even use a software to extract the data.. I need the display to turn on, somehow? ..

There might still be a short, but it's hard to measure, on the pp_soc or pp_gpu lines, but I'm not quite sure since they have very little resistance.

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L4000 is part of Chestnut, therefore the LCD driver. It is a coil and it should measure zero Ohms so what condition makes you say it is burned (is it physically damaged)?

At any rate, double check to see if it is a backlight issue (dim image) or LCD driver (no image at all) and then focus your attention on the relative circuit. Start with the filters and work your way back to diodes, caps, coils and then the IC (as appropriate, each circuit is different).

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Thanks, some dude tried to repair it and has removed the L4000, I think it was because of corrosion but I'am not sure. There is no image on the screen, like it's all dead. I'm not really sure where to begin from here since it's the first time I'am doing this.

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Maby I could cheat by manually soldering a wire to the missing l4000 pad and give it power from my supply? If I am correct, from the PDF schema I have, then without the l4000 there should be no image at all, because it's needed to power the chestnut with 6ish volt?

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You can't replace a coil with a wire, you will lose all if the inductive effect of the coil, which is needed to boost the voltage for the LCD. Get a coil and replace it, it's much simpler.

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thomze will be eternally grateful.
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