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6 Panic CPU x caller - Reboot every 3 minutes - Charging Port Flex?
I am looking for ideas to help fix a problem I’m having with an iPhone X. Bear with me while I describe the history, what I’ve done so far, and what the current symptoms are.
The customer said he had originally had the screen replaced at a mall kiosk and it worked well for a couple of months but one day it would not turn on. What I actually found was the phone was turning on but the screen had failed and was not turning on. I installed a new screen and all seemed well. I gave it back to the customer in seemingly 100% working condition. A few days later he brought it back to me and said it was rebooting every few minutes.
- I tried forcing an update - no change, still rebooted after a few minutes.
- I tried a DFU restore - no change, still rebooted after a few minutes.
- I googled the issue and found numerous reports about issues with the charge port causing the phone to restart every 3 minutes. I checked and confirmed the phone would reboot after 3 minutes consistently. So I ordered a new charge port flex.
- I first tried to temporarily disconnect the original flex in the phone and temporarily connect the new bare charge port flex. Voila, the phone stayed running beyond 3 minutes.
- I disassembled the phone, removed the original charge port flex, reinstalled the new charge port and reassembled the phone. Initially the phone seemed to be fixed. But after several hours I noticed it starting to go back to the 3 minute reboot cycle again. Grr. Maybe I damaged it during installation I thought.
- I ordered another new part and repeated step 4 and 5 but with greater care. Again, with the new part installed the phone seemed to fixed. This time I set the screen to stay on and started a stop watch. The phone stayed on for over 3 hours so I left it overnight.
- In the morning, the phone was BACK TO RESTARTING every 3 minutes!!!
- For fun I disconnected the 2nd new flex that was installed in the phone and connected one of the other charge ports that I had swapped out. With only the charge port by itself connected the phone still reboots. Conclusion - the flex is getting damaged somehow just by connecting it to the phone (my theory anyway).
- Some posts on here suggested a DFU restore fixed this issue - in my case, it does not. Tried it. No difference.
I dug into the analytics logs and using 3U Tools see that every time it reboots it logs a “Panic CPU x caller” entry.
Here is the detailed text from one of these entries. Has anyone seen this? What can I try next? I’m hesitant to install a third charge port but do have one if need be.
Thanks in advance for your help,
Larry
——————————-
{"bug_type":"210","timestamp":"2021-11-06 21:28:52.00 -0600","os_version":"iPhone OS 15.1 (19B74)","incident_id":"41C3AD2D-4165-42EE-9166-C156236A84EC"}
{
"build" : "iPhone OS 15.1 (19B74)",
"product" : "iPhone10,6",
"kernel" : "Darwin Kernel Version 21.1.0: Wed Oct 13 18:16:58 PDT 2021; root:xnu-8019.42.4~1\/RELEASE_ARM64_T8015",
"incident" : "41C3AD2D-4165-42EE-9166-C156236A84EC",
"crashReporterKey" : "d6ac110a82cef07ecd55c818d6c8d79130b244dc",
"date" : "2021-11-06 21:28:52.45 -0600",
"panicString" : "panic(cpu 1 caller 0xfffffff02941f0f4): userspace watchdog timeout: no successful checkins from thermalmonitord since load\nservice returned not alive with context : is_alive_func returned unhealthy : current 7bfffffffff, mask 67fffffffff, expected 67fffffffff. SD: 1 BC: 0 Missing sensor(s): mic1 \nservice: backboardd, total successful checkins since load (180 seconds ago): 19, last successful checkin: 0 seconds ago\nservice: SpringBoard, total successful checkins since load (168 seconds ago): 17, last successful checkin: 0 seconds ago\nservice: mediaserverd, total successful checkins since load (180 seconds ago): 19, last successful checkin: 0 seconds ago\nservice: logd, total successful checkins since load (180 seconds ago): 19, last successful checkin: 0 seconds ago\nservice: thermalmonitord, no successful checkins since load (180 seconds ago)\nservice: runningboardd, total successful checkins since load (180 seconds ago): 19, last successful checkin: 0 seconds ago\nservice: wifid, total successful checkins since load (180 seconds ago): 19, last successful checkin: 0 seconds ago\nDebugger message: panic\nMemory ID: 0x6\nOS release type: User\nOS version: 19B74\nKernel version: Darwin Kernel Version 21.1.0: Wed Oct 13 18:16:58 PDT 2021; root:xnu-8019.42.4~1\/RELEASE_ARM64_T8015\nKernel UUID: 13E2F321-3388-3B9E-9D68-75E2081A4A02\niBoot version: iBoot-7429.42.2\nsecure boot?: YES\nPaniclog version: 13\n
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101 
4 comentarios
i have the same issue but my phone does’nt restart in 3 min my phone is restarting random time some times it restart after one hour some times it restart after 20 min
what should i do
- de MIR GamingYT
@MIR GamingYT Best way to get answers is to start a new question. Check for panic log entries and add them to your post if any are present. The first page or so is usually sufficient.
iPhone Kernel Panics
- de Jerry Wheeler
Dear,
I had the same isseu with my ipad 6 and it ended up in a bootloop then only recovery. not able to restore it.
I did something you could try as last resort if the device is compleet dead like mine.
I did it in the past with gpu,s and i put the logicboard in the over for 10 min at 180 degrees coverd the ports and charging port with thermal pads and it works fine now .
- de tristan de graeve
I have the same problem but I notice that when my phone is running something in background it won’t restart, AO I turned on background sound in my control Centre and put the volume to zero and it always stay on as it should be but anytime I forget to turn it on my I’ll always meet my phone switched itself off
- de Ajibade faizol