Troubleshooting iPhone 11 after back housing replacement

I just replaced the back housing on my iPhone 11 and since the replacement it keeps restarting with the Apple logo every five-ten minutes. I’m assuming something is loose maybe, does anyone have any suggestions on where I should look first in order to fix this issue?

Here is the first page to my panic logs (assuming I located it properly):

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panic-full-2025-07-21-082521.0...

"socld" : "8030"

"socRevision" : "11",

"incident" : "9282A46B-D0D7-494D-8B92-83017CBE3A5C"

"crashReporterKey" : "4a5b9cbc5951f15b75a48cfee5b3d74390682a2c", "kernel": "Darwin Kernel Version 24.5.0: Tue Apr 22 20:36:50 PDT 2025;

root:xnu-11417.122.4~1VRELEASE_ARM64_T8030",

"date": "2025-07-21 08:25:21.83 -0700" "panicString": "panic(cpu 1 caller Oxfffffff01b07e2d): userspace watchdog timeout: no successful checkins from thermalmonitord (2 induced crashes) in 180 seconds|nservice returned not alive with context: is_alive_fune returned

unhealthy : current bfffffffffff, mask iffffffffffff, expected 1ffffffffffff. SD: 1 BC: 1 RC: -1 BS: 1, Missing sensor(s): mic2 \nservice: backboardd, total successful checkins in 892 seconds: 86, last successful checkin: 0 seconds agonservice: SpringBoard, total successful checkins in 863 seconds: 84, last successful checkin: 0 seconds ago|nservice: audiomd, total successful checkins in 892 seconds: 86, last successful checkin: O seconds ago|nservice: logd, total successful checkins in 892 seconds: 86, last successful checkin: 0 seconds ago|nservice: thermalmonitord (2 induced crashes), total successful checkins in 892 seconds: 25, last successful checkin: 180 seconds ago\nservice: runningboardd, total successful checkins in 892 seconds: 86, last successful checkin: 0 seconds ago|nservice: wifid, total successful checkins in 892 seconds: 86, last successful checkin: 0 seconds ago|nservice: configd, total successful checkins in 892 seconds: 86, last successful checkin: 0

seconds ago|nservice: Commenter, total successful checkins in 892 seconds:

85, last successful checkin: 0 seconds ago|n\nDebugger message: panic Memory ID: Ox6 nOS release type: User nOS version: 22F76 nKernel version: Darwin Kernel Version 24.5.0: Tue Apr 22 20:36:50 PDT 2025;

root:xnu-11417.122.4~1VRELEASE_ARM64_T8030|nFileset Kernelcache UUID:

94BF08676D5D31FEA09B23C24902D814\nKernel UUID: 1FC79AED-82C1-32EC-9B19-228670CBCA1C\nBoot session UUID: 9282A46B-

DOD7-494D-8B92-83017CBE3A5C\niBoot version: iBoot-11881.122.1\niBoot

Stage 2 version: Insecure boot?: YES\nroots installed: O|nPaniclog version:

14 nKernelCache slide: 0x00000000127b4000 nKernelCache base:

Oxfffffff0197b8000\nKernel slide:

0x00000000127bc000\nKernel text base: Oxfffffff0197c0000\nKernel text exec slide: 0x0000000013694000|nKernel

text exec base: Oxfffffff01a698000\nmach_absolute_time:

Ox4fd51d858\nEpoch Time:

sec

usec n Boot

: 0x687e2a6b

0x00022702\n Sleep

: 0x687e5aff 0x0001ac90\n Wake : 0x687e5b1a

Ox0007a5e6\n Calendar: 0x687e5bc0 0x0003e05c\n\nZone info:\n Zone map:

Oxffffffdc00b24000 - Oxffffffe200b24000\n.vM

: Oxffffffdc00b24000 -

Oxffffffdce7188000\n RO

: Oxffffffdce7188000 - 0xffffffdd33e5c000\n

GENO: Oxffffffdd33e5c000 - Oxffffffde1a4c0000\n. GEN1 :

Oxffffffde1a4c0000 - Oxffffffdf00b24000|n . GEN2 : 0xffffffdf00b24000 -

Oxfffffffe718c000|n. GEN3 : Oxffffffdfe718c000 - Oxffffffe0cd7f4000\n.

DATA: Oxffffffe0c7f4000 - Oxffffffe200b24000|n Metadata: Oxffffffe56f880000 - Oxffffffe571080000|n Bitmaps: Oxffffffe571080000 - Oxffffffe571b84000|n Extra : 0 - O|n\nCORE 0 recently retired instr at Oxfffffff01a838e94\nCORE 1 recently retired instr at Oxfffffff01a837934|nCORE 2 recently retired instr at Oxfffffff01a838e94\nCORE 3 recently retired instr at Oxfffffff01a838e94\nCORE 4 recently retired instr at

Oxfffffff01a838e94\nCORE 5 recently retired instr at

Oxfffffff01a838e8c|nTPIDRx_ELy = {1: Oxffffffdf008264e0 0:

0x0000000000000001 Oro: 0x000000016b9c30e0 YnCORE 0:

PC=0x00000001a8f26ff0, LR=0x00000001a8f1c674, FP=0x000000016b7d2570\nCORE 1 is the one that panicked. Check the full backtrace for details.|nCORE 2: PC=0x000000021bb50390,

LR=0x000000021bb4f488, FP=0x000000016bd4fcc0\nCORE 3:

PC=0xfffffff01a8338d8, LR=0xfffffff01a71b35c, FP=0xffffffe75f257edO|nCORE

4: PC=0xfffffff01a71b09c, LR=0xfffffff01a71b09c,

FP=0xffffffe75f353ed0|nCORE 5: PC=0xfffffff01a834138,

LR=0xfffffff01a834134, FP=0xffffffe75fa2fe60\nCompressor Info: 24% of compressed pages limit (OK) and 8% of segments limit (OK) with 2 swapfiles and OK swap space|nTotal cpu_usage: 48601358\nThread task pri

cpu_usage\n0xffffffdf008264e0 watchdogd 97 0\n0xffffffdf002c7270 trustd 4

1626\n0xffffffdeffeca4e0 amsengagementd 4 686527\n0xffffffdf009a9e18

kernel_task 0 0|n0xffffffdf00823270 kernel_task 0 0|n|nPanicked task

wtchdogd\nPanicked

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I just copy and pasted the text but let me know if a screenshot would be better for you to work with.

I really appreciate you taking the time to look into this for me. It’s very kind of you and it helps make my search for answers so much easier. Thank you!

Well, that’s great to hear! I am A-M-A-Z-E-D at how quickly you were able to narrow down the problem and have a solution for me! Even more so, I didn’t expect to get a solution so specific and down to the T. I just assumed I’d be given a huge list of possible problem areas and the options to fix them, but this is truly a relief. I can’t thank you enough, you’ve made my job so much easier now. I especially appreciate all the links to the parts, the repair guides and the how to guides you attached for me as well. You don’t know how much time you’ve saved me by doing that. So, thank you, thank you, thank you a million times!

I hate to take up more of your time and I hope this is okay, but I do have one last question I have to ask you and I’m only asking because I’ve spent one too many hours searching online for this….Do you know of some kind of chart or diagram online on the iphone 11 that shows every internal screw size and their location? Most of my repair experience has been dealing with the iphone 6 Plus and iphone 6s Plus and since I was able to find a chart or repair guide video online specifically showing those two things, I have it set in my head that there has to be something like that for the iphone 11 too. At least a YOUTUBE video that covers all that throughout the entire tear down process. You seem to be very knowledgeable in this topic of iphone repairing and with that usually comes with a lot of time and hands on experience so I thought maybe at some point you’ve come across something like that or know where to find one. Long story short, there were two instances during my back housing replacement repair where I ended up with 3-4 screws in front of me, all of which were complete different sizes, and unfortunately I made the decision not to mark it down where they came from thinking I would remember but I was wrong. And with all the hours I spent looking online for something that showed the screw sizes for the two locations I was clueless on, I could not find anything at all! I also reached out and messaged a couple repair places online but only one responded and they didn’t have anything or knew where to find something like that. I’m really hoping you could help me, but If not it’s no big deal. I’m extremely grateful for everything else you helped me with previously!!! Thanks again! I look forward to your response.