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Lanzado en Septiembre 16, 2016. Modelos 1660, 1778. Disponible en GSM o CDMA / 32, 128, o 256 GB / Oro Rosa, Oro, Plata, Negro Mate y Negro Brillante.

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Why does iPhone 7 power off?

My girlfriend’s iPhone 7 will power off by itself a short time after using it. If it’s left alone it will stay powered on. It seems to get warm while using it. About a week before this began to occur the iPhone suffered a brief water dunking. Any thoughts on this?

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a brief water dunking”…when water is in the equation, all bets are off.

With water damage, you have to decontaminate the logic board before doing anything else.

The water is inside the phone, on the logic board and under the shields, even under the IC's. 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, 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.

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.

 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 Minho! That was very thorough and helpful info. At the time of the water immersion (in Lori Jo's backpack during a river crossing) we thought that the iPhone 7's water resistance would have protected it but it looks like this was not the case. I'll see what I can do. Thanks again!

Randy

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Some phones can survive hours under water while others fail at the slightest contact. The water-resistance methods used are not absolute, IMHO.

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