Released on September 19, 2014, this 4.7" screen iPhone is the smaller version of the iPhone 6 Plus.

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Water damaged phone works perfectly after drying but overheating

So I recently dropped my phone in the toilet, immediately fished it out and switched it off and started shaking water out of it. I put it in silica gel packets to draw out some of the moisture (this was at night). The next morning I was able to get access to a screw set to open up the phone and dry it off and I thoroughly blasted all parts with compressed air to dry it all off.

I turned it on and it worked perfectly, camera was fine, able to send and receive texts, use wifi, etc, basically functioning as usual (save for small water stains on the screen).

However, a few minutes later, I noticed that it was starting to overheat in the upper right side, so I immediately switched it off, and it remains off. Any leads as to what's causing it and how I can fix this?

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Hi,

As you know water and electronics and electricity are not a good mix.

The water causes corrosion and provides circuit paths for the electricity which were not in the phone's operating design and could damage the components.

First do not turn on your phone and then you need to remove the battery as soon as possible from the phone to minimize further damage.''

Then you need to dis-assemble the rest of the phone and clean all the affected parts using Isopropyl Alcohol 90%+ to remove all traces of corrosion and water. Do not use "rubbing alcohol" as in some cases this is only 70% and is not as effective. If you do check the label to verify the amount

Here is a link that in general, describes the process.

Electronics Water Damage

You may have to replace the battery as it is very hard to recover a battery from water damage.

As always with electronics, especially surface mounted PCBs be gentle when handling and especially when brushing away the corrosion. You do not want to remove any components from the board.

Hopefully after you have done all this the phone might possibly work correctly again.

Here is a link to the ifixit guide(s) for repairing your phone.

iPhone 6

If this process seems too daunting, take your phone to a reputable, professional phone repair service and ask for a quote for a repair. If you decide to do this, do it sooner than later.

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The iPhone 6 tends to have water damage along the WLAN/BT chipset. There is a small capacitor that filters the VCC_MAIN line. Just below that area, there is quite a bit of circuitry for Touch and the PMIC (main voltage regulator).

You did a good intervention (no rice!!), the only thing you could have done better was to bring it to a pro asap. The water will seep under the various IC's, short components etc and it is not always visible as you have to remove the shields. The sooner the phone is properly decontaminated, the better.

Realistically speaking, this kind of repair is beyond what the typical fixer is capable of. Unless you have very limited and localized corrosion, you need specialized tools (soldering iron, hot air rework, schematics, board views, ultrasonic cleaner).

Look for a professional micro-solderer or repair shop that applies all of the best practices.

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