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Lanzado en Septiembre 19, 2014, este iPhone con pantalla de 4.7" es la versión pequeña del iPhone 6 Plus.

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iPhone randomly shut down and won't respond to anything

Hi,

I have an iPhone 6 that got very wet after being in the same bag as a drink bottle and it didn’t turn on. After opening it up I discovered that the home button connector had corrosion so after cleaning that up and leaving it in rice for 48 hours, the phone booted up just fine. It has been working perfectly for over a week, nothing wrong until today when it just suddenly died and gives no response to charging or a laptop. I’ve put a spare battery in as well as a cracked but working display but nothing is working. I imagine some other component has become damaged from the water and suddenely died stopping the phone from booting but I don’t know what one. Could someone please help me? A good starting place would be to remove all non-essential components from the phone but I’m only experienced with battery and screen replacments and don’t know what I can remove.

Thanks

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With water damage, you have to decontaminate the logic board before doing anything else, otherwise there will be latent issues down the road, as you saw in this instance.

 Rice is a persistent myth, one that should be eliminated from the vernacular :>)

The water is inside the phone, on the logic board and under the shields, even under the IC's. The rice is nowhere near where the water is. So while it “may’’ soak up some water vapour, the real problem is the mineral deposits that can cause short circuits or the corrosion that is taking place as the water evaporates. Leaving the power on the device accelerates the process. The longer you let a phone sit in rice, the more time you are giving corrosion to damage your logic board. The saltier or harder the water is, the more damage will occur. The water needs to be displaced, not evaporated.

On some phones, rice treatments appear to work. But those are phones that had minimal water ingress and not anywhere near a danger area on the logic board. They would have recovered regardless of the intervention.

 The proper way treat a wet phone is to do the following:

  • Open your phone and remove the logic board (follow this guide)
  • Inspect the logic board, especially around the connectors and look for corrosion.
  • Inspect both sides of the board. Unfortunately, most of the board is covered in shields. That's usually where the damage is occurring.
  • Put your board in a container with >90% isopropyl alcohol and let it sit for a while.
  • Use a soft brush, like a toothbrush and lightly brush away any corrosion you see.
  • Rinse in alcohol and repeat.
  • Let it air dry for a day.
  • Re-assemble and hope for the best.

You should also replace the battery if it has swollen. Resist the temptation to pop it to let the gas out. A compromised Li-ion battery is a fire hazard. If the device appears to power up but behaves erratically, then use a tool like 3uTools to flash the firmware as it may be corrupted. In your case specifically, if you want to rule out “peripherals” as opposed to the logic board, connect just the battery and Lightning Port to the logic board and connect  it to iTunes. If the board works, at least minimally, then iTunes will see the phone. However the problem here is that you don’t know if the battery or Lightning port is good.

A professional repair shop that does water damage repair may be able to recover your phone or the data because they have access to pro-level ultrasonic baths and specialized cleaners as well as the skills to troubleshoot your board. Many shops have a no fix/no fee policy so you don't have to spend money to find out if the phone is fixable or not.

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Thanks for the advice, I swapped the logic board into another working iPhone 6 and it didn't turn on but after inspecting the board I found some corrosion on the underside over some resistors. I'll go get some isopropyl soon and try clean it

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I left the board in isopropyl alcohol for about 30 mins then cleaned it all up with a toothbrush and repaeated that about 5 times and I tried turning on the phone but it still doesn't work. Any other ideas to try fix it? I do have another working iPhone 6 so would a logic board swap to test the board with working peripherals be a good idea?

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Sure, that will help you determine if the problem is with the logic board (likely) or not.

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I swapped the boards, no response from the water damaged one when plugged into iTunes so it's a board issue. I don't have a hot air station so is there a way to take the EMI shields off with only a soldering iron? This would enable me to try clean out the chips under the shields, after that i think it'd just be time to strip the phone for parts :(

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Some people tear them off but that can damage the components underneath. I would consider having it looked at by a pro...

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