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De mainstream iPhone 2019 van Apple, die 20 september uitkomt, heeft een 6,1-inch lcd-touchscreen, dubbele camera's en zes beschikbare kleuren. De opvolger van de iPhone XR.

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Boot looping - panic log giving different errors

My Iphone 11 started boot looping continuously about 2 weeks ago. Initially, it would show the Apple logo for a few seconds then restart with the same. It would never progress to home screen. As a result, I wasn't initially able to read panic logs.

I attempted a reset which made no difference so thought that I had no option but to do a full restore. This didn't work stalling at near the end every time. Eventually after dismantling phone and unplugging the screen and the front camera, I was able to restore the iOS with 3utools. Now the phone switches on and for a short time, everything works.

Since then the phone boot loops on a unpredictable basis. On standby, it might boot loop every few hours whereas during active use, it never passes 3 minutes without restarting.

I have read panic log (I have data from about 100 restarts). Most of the time, it mentions Prs0 sensor missing but sometimes it is a AOP error.

I downloaded a Barometer app and interestingly most of the time, it displays 0 hPA.

iDevice panic log analyzer suggests: Charging flex, power button or NAND as possible causes based on about 30 checks.

I changed the Charging flex yesterday, and for the first time after restart, it worked for more than 3 minutes (maybe about 5 minutes). The Barometer app did show a valid reading during this time.

Sadly, the phone then switched off and resumed its previous behaviour. The Barometer app was back to 0 hPA.

Next strategy might be to replace power button. The other possibility is that the the Charging flex is defective (was not OEM as due to my current home location, used flexes are difficult to get).

The phone has been repaired by me before about 1 year ago. I replaced the screen twice (OEM with new glass bought on ebay) and replaced the battery with aftermarket one. Since these repairs, it worked perfectly for over a year. The screen has 2 small areas at the edge where it appears there may be fluid or separation of the layers. This has been present for several months and I assumed that it was an imperfect glass adhesion from replacing the glass before. I am not aware of any significant water damage and I cannot see any corrosion inside. There is no obvious physical damage.

Please help!

Last Panic log:

panic(cpu 1 caller 0xfffffff02390cb54): userspace watchdog timeout: no successful checkins from thermalmonitord (2 induced crashes)

service returned not alive with context : is_alive_func returned unhealthy : current 37fffffffffff, mask 1ffffffffffff, expected 1ffffffffffff. SD: 0 BC: 1 RC: -1 BS: 2, Missing sensor(s): Prs0

service: backboardd, total successful checkins in 200 seconds: 19, last successful checkin: 0 seconds ago

service: SpringBoard, total successful checkins in 172 seconds: 17, last successful checkin: 0 seconds ago

service: audiomxd, total successful checkins in 200 seconds: 19, last successful checkin: 0 seconds ago

service: logd, total successful checkins in 200 seconds: 19, last successful checkin: 0 seconds ago

service: thermalmonitord (2 induced crashes), no successful checkins in 200 seconds

service: runningboardd, total successful checkins in 200 seconds: 19, last successful checkin: 0 seconds ago

service: wifid, total successful checkins in 200 seconds: 19, last successful checkin: 0 seconds ago

service: configd, total successful checkins in 200 seconds: 19, last successful checkin: 0 seconds ago

service: CommCenter, total successful checkins in 200 seconds: 18, last successful checkin: 0 seconds ago

Debugger message: panic

Memory ID: 0x6

OS release type: User

OS version: 22C161

Kernel version: Darwin Kernel Version 24.2.0: Thu Nov 14 22:50:27 PST 2024; root:xnu-11215.62.3~1/RELEASE_ARM64_T8030

Fileset Kernelcache UUID: A34459B275C0562A53181E47D8168C40

Kernel UUID: 6AFCFD41-ED06-320E-A682-0C4FB443FB22

Boot session UUID: 2D15CBAF-3730-4BEC-82DB-B92745BC4F14

iBoot version: iBoot-11881.62.2

secure boot?: YES

roots installed: 0

Paniclog version: 14

KernelCache slide: 0x000000001b12c000

KernelCache base: 0xfffffff022130000

Kernel slide: 0x000000001b134000

Kernel text base: 0xfffffff022138000

Kernel text exec slide: 0x000000001bf60000

Kernel text exec base: 0xfffffff022f64000

mach_absolute_time: 0x11f00b2e5

Epoch Time: sec usec

Boot : 0x67989e87 0x00085a60

Sleep : 0x6798a1c2 0x000eb097

Wake : 0x6798a20c 0x000c0e52

Calendar: 0x6798a221 0x0004ca03

Beantwoord deze vraag Dit probleem heb ik ook

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Ja Nee
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1 Opmerking:

Hi Seppebruyland

Yes I have ordered a used OEM charging port from E Bay. I will report back once it’s installed.

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Missing sensor Prs0 points to a missing signal from the charging flex (https://www.ipadrehab.com/article.cfm?Ar...) Your charging port could be of bad quality or the connection to the sensor could have a problem.
It goes:
CPU - PCB - connector - Flexcable - sensor
Somewhere along this pad something is going wrong, the connector could also be dirty since the problem seems to have become more intermittent since replacing the charging port (5 minutes means it passed the 200 sec at least ones). Perhaps you could try to find an original (pulled) replacement port on Ebay.

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Ja Nee
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4 opmerkingen:

Sadly replacing charge port didn’t help. Still boot looping, now with ‘DART - AOP’ error.

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That means that the Prs0 is probably fixed, since that was more frequent before replacing the charging flex. Would it be possible to post your kernel panic log which now has the AOP error?

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Breakthrough!

Despite new parts (Charging dock and Power flex with flash LED), I continued to get random reboots, usually with Prs0 errors but sometimes AOP/DART errors.

I noticed that the Taptic Engine isn’t working. Not sure when it stopped - I assumed that I broke it when replacing another component but maybe it was the problem all along. So I ordered a new one from EBay. But since it’s going to be 2 weeks at least until it gets to me, I thought that I would remove the current one. Seems to be fixed. No reboot for the last 2-3 hours. Before it would rarely run for 3-4 minutes without reboot if screen was on. Before, strangely, on standby (black screen but on), it would reboot in a random timescale (sometimes hours).

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New Taptic Engine did not restore haptics but everything else on phone works perfectly. Interestingly, when Taptic Engine was not installed, every time I received a notification, there was a few second delay until the phone made a sound. With replacement Taptic Engine installed (even though it doesn’t work), this delay had disappeared. I have searched hard to find out if you need to programme a new Taptic Engine and I can find nothing to suggest that you do need to, on an iPhone 11. Maybe the replacement Taptic Engine is faulty but I doubt this.

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DJB zal eeuwig dankbaar zijn.
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