iPhone Boot Cycle / Overheating

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apple1915 Author

Level 1

12 points

iPhone Boot Cycle / Overheating

Device: iPhone 6s

Problem: Boot Cycles and unnormal behaviour after some events of overheating

What happened: On one day my phone gets too hot in the sun three times (while navigating in a car). It showed the screen, not letting me do anything, I take it out of the sun and it cools down and lets me use it again. I get out of the car and into the supermarket, taking my phone with me. After 15 minutes I try to use my phone and notice that it is powered off – I was unable to activate it again via power button (battery was full when leaving the car). Back to the car, I plug it into the charger. It acts normally for 10 minutes, then starts to boot cycle (white screen with apple logo, turning black, white screen again and so on). I take it out after a few minutes. Once arriving in a hotel, I use the big iPad wallplug and my lightning cable and charge the phone with that. It turns on again and acts normally for about 10-15 minutes, then starts to boot cycle again. I tried to restore the phone, desperately hoping for a (very unlikely) software issue. Was unable to restore the phone because boot cycle always started before iTunes even got close to start the process on the phone. That produced the iTunes error No 2006. I started a one week hike without the phone at this point. Coming back, I plug the phone into my laptop again with lightning cable. This time, I am able to restore it properly. Counting the time for the restore process and the time afterwards, the phone behaved normally for about one hour – still plugged into the lightning cable, it then starts to boot cycle again.

More Context:

- Battery was changed from a 3rd party about one year ago.

- Power button started to work unregularly three weeks before the day my phone stopped working as described above. Had it repaired by a 3rd party two and a half weeks before that day. Camera did not work after the repair (so they seem to not have done a good job at repairing), I brought it back, they fixed it.

- Battery had first outage (meaning the phone suddenly turned of despite sitting on 25% battery) two weeks before the day described above.

- I had an incident with water with that phone in last december (= seven month ago). The side with AUX and lightning was not in the water; the other end was (about 2cm deep, standing upwards). Phone worked normally through all that, after some days about 1 square milimeter of the display had a discoloration (upper left corner).

Question: What is going on? Is there a serious way to tell what to do? Change battery? Or is it the mainboard? What would you do? Is it worth to even try anything?

iPhone 6s, iOS 11.4.1, null

Posted on Aug 7, 2018 10:27 AM

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Answer 1

Tesserax

Level 10

158,202 points

Aug 7, 2018 12:41 PM in response to apple1915

I did! I just wanted to offer you some steps to try. Sometimes, even if you have tried them before, may just "work" this time.

The other issue is that you posted that your phone experience a "water incident."

"- I had an incident with water with that phone in last december (= seven month ago). The side with AUX and lightning was not in the water; the other end was (about 2cm deep, standing upwards). Phone worked normally through all that, after some days about 1 square milimeter of the display had a discoloration (upper left corner)."

Water did enter your iPhone. At best, it did not cause any initial damage, but it may be likely that when it evaporated that it left trace minerals behind that are causing a short circuit. Again, another potential reason for what you are experiencing.

I suggest that you take the phone in and have it looked at ... and depending on when your purchased it and if it still have an active AppleCare+ service plan, as you said: "Is it worth to even try anything?"

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Answer 2

Tesserax

Level 10

158,202 points

Aug 7, 2018 12:03 PM in response to apple1915

Yes, it's possible that the phone is damaged due to operating it outside of its temperature range.

Some things you can try:

Try the following in order: (Note: If any step resolves the issue, STOP, do not go on to the next step.)

Restart your iOS device: To restart your (perform a soft reset) iOS device, press and hold the sleep/wake button while pressing and holding the Home button. When you see the Apple logo, release both buttons. (Note: This will NOT delete any data or apps, nor change any of its settings.)
Perform a "Reset All Settings" reset: Settings > General > Reset > Reset All Settings
Reset your iOS device to its factory default settings: Settings > General > Reset > Erase All Content and Settings
Restore you iOS device: To restore your iOS device, connect it to your computer. When the iOS device appears in the iTunes source list, click the Restore button on the Summary tab. Note: This will erase all of your data and media and resets all of the iOS device's settings. You will need to restore it from a previous backup from either iTunes or iCloud.
Make aGenius Bar appointmentat your local Apple Store or take it to anApple Authorized Service Provider.

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Answer 3

apple1915 Author

Level 1

12 points

Sep 18, 2018 3:04 PM in response to Tesserax

It seems, that the phone works normally longer when it was turned off for a longer time. I did not try using it for a week, then it worked for two days. Then it boot cycled again. Same thing a week later: worked for roughly two days, then stopped. What can this be/mean?

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Answer 4

apple1915 Author

Level 1

12 points

Aug 7, 2018 11:41 AM in response to Tesserax

yes, that happened, as I said. do you think that makes for permanent issues? because, as I said, the boot cycle issues now exist without high temps.

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Answer 5

apple1915 Author

Level 1

12 points

Aug 7, 2018 12:10 PM in response to Tesserax

Come on, you did not even read my description obviously!

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Answer 6

Tesserax

Level 10

158,202 points

Aug 7, 2018 10:50 AM in response to apple1915

What happened: On one day my phone gets too hot in the sun three times (while navigating in a car). It showed the screen, not letting me do anything, I take it out of the sun and it cools down and lets me use it again.

Do you mount the phone such that is sits on top of the dashboard in direct sunlight for extended periods when using it for navigation purposes? If so the combined temperatures from both sunlight and the phone's CPU processing navigation data could easily bring the phone's temperature well above its designed operating range ... and that may be the reason you are seeing these issues using it.

Environmental Requirements - iPhone 6s

Operating ambient temperature: 32° to 95° F (0° to 35° C)
Nonoperating temperature: ‑4° to 113° F (‑20° to 45° C)
Relative humidity: 5% to 95% noncondensing
Operating altitude: tested up to 10,000 feet (3000 m)

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iPhone Boot Cycle / Overheating

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