|
|
| Line 1: |
Line 1: |
| {{Repair Guide | | {{stub}} |
| |Device=iPhone 11
| | {{Device page |
| |Affects parts=Main Logic Board
| |
| |Needs equipment=Screwdrivers, known good parts, spudger
| |
| |Type=Part replacement
| |
| |Difficulty=1. Easy
| |
| }} | | }} |
| {{stub}}
| |
|
| |
|
| |
| ==Problem description==
| |
| There are many reasons that could cause an iPhone 11 randomly restart every few minutes. For the iPhone 11, there are some sensors within the parts of the phone that are required to be plugged in & detected. Otherwise, the phone restarts on its own.
| |
|
| |
| The most common for iPhone 11 series are:
| |
| *'''Bad or Defective Battery''' - If the phone is not showing a percentage at the top of the screen, it means the battery data isn't being read by the device, causing the device to restart. So if you see your iPhone 11 says it's charging at 0%, that could be why it's restarting.
| |
|
| |
| *'''Charging Port Flex''' - This is the flex towards the bottom of the phone which is slightly exposed behind the back glass. It is easily damaged with a drop & broken back glass, or by a technician during a back glass repair.
| |
| *'''Damaged or Defective Power Button''' - There is a secondary mic (mic2) that is on the power button flex. It is easily damaged, especially after back glass repair, causing the mic to be disconnected & the phone will restart when it's not detected.
| |
| *'''Motherboard Sandwich Separation''' - If an iPhone 11 has a hard drop, it can cause the 2 layer sandwich to separate, which will disconnect the mic2 line from the power button flex, as that connect is on the bottom board. So it may need a sandwich reball to repair it.
| |
| ==Symptoms==
| |
| *After a back glass repair, the iPhone will restart on its own every few minutes
| |
| *After a battery replacement, the iPhone will bootloop every 3 minutes
| |
| *After replacing the charging port flex, the device will auto restart on its own randomly.
| |
| *The iPhone will reboot randomly when using it.
| |
| *The iPhone will seem to freeze and restart every 2-5 minutes.
| |
| ==Solution==
| |
| ===Diagnostic Steps===
| |
| Before you start blindly replacing parts, it's important to try to confirm what is causing the restarting issue by reviewing the Panic Log file. This is a file that is generated by the Operating System, to document the fault causing the restart.
| |
|
| |
| To find the panic log on the device, go to Settings-> Privacy-> Analytics & Improvements-> Analytics Data-> Scroll down to the files starting with "panic-full..." & click on the most recent dated file.
| |
|
| |
| Then you'll want to scan through the text for keywords that may point you to the cause.
| |
|
| |
| For this model, look for where it says "Missing Sensors:.."[[File:Panic Log List.png|thumb|An example of panic log files you'll find in the iPhone when it has been randomly restarting.]]If you see:
| |
| *'''TG0B or TG0V''' - It's battery related:
| |
| **The battery is defective or has failed
| |
| **The battery connector itself is damaged, warped or broken
| |
| **The battery connector data lines are missing.
| |
| ***Check the battery data pins ('''I2C2_SMC_SCL_CONN''' and '''I2C2_SMC_SDA_CONN''') for a diode mode reading. If it's OL, check the resistors R3202 and R3201 for damage. Otherwise, the disconnection could be under the CPU & requires a CPU reball. If you get a short, then check the caps around the connector. Otherwise, the short is within the CPU likely not fixable.
| |
|
| |
| *'''Prs0 or Mic1''' - It's the charging port flex.
| |
| ** Make sure it's plugged in & the flex is not torn
| |
| ** Check that there's no liquid damaged, or that it's defective
| |
| ** Test with OEM or Premium. Aftermarket Flexes have a high defect rate
| |
| ** Diode mode the FPC connectors for any faults
| |
| **Check for damaged or missing resistors around the charging port connector
| |
| **Check R6822 (I2C1_AOP_SCL) and R6823 (I2C1_AOP_SDA) resistors
| |
|
| |
| *'''Mic2''' - It's related to the mic on the power button flex
| |
| **Test with a known good power button flex
| |
| **Check for pry damage on all the small components near the connector
| |
| **Diode mode the power button connector & see if you get an OL. If so, you may have to split the sandwich and check for mic2 lines and ripped pads. You may need to reball the sandwich to fix it.
| |
| [[File:Panic Log Prs0.png|thumb|An example panic log, showing "Missing sensors: Prs0", which means it has a bad charging port flex.]]
| |
|
| |
|
| |
| Alternatively, you can use a tool like the [https://github.com/waynebonc/iDeviceLogAnalyzer-public iDevice Panic Log Analyzer], which will download the panic logs from the device & display them on the PC & give you suggestions to possible solutions. It makes it easier to browse the panic log file.
| |
|
| |
|
| Also, check out [https://www.panicfull.com/ www.PanicFull.com] which allows you to upload the panic log file & have it analyzed for free.
| | == Guides == |
| | {{List Guides}} |
|
| |
|
| Both of these tools just give suggestions, which aren't always correct, as there is no official solution list from Apple. So many solutions are just suggestions based on hearsay, rumors or just guesses.
| | == Device pictures == |
| | <gallery showthumbnails="1"> |
| | File:Example device pictures.jpg |
| | </gallery> |
|
| |
|
| For situations where you don't see the above examples, you'll have to read through the top portion of the panic log & try to decipher what could be the root cause. Look for keywords you may recognize.
| | == PCB pictures == |
| ===Repair Steps=== | | <gallery showthumbnails="1"> |
| When trying to solve for these issues, make sure to replace the appropriate flex with an OEM or Premium flex.
| | File:Example pcb pictures.jpg |
| | </gallery> |
|
| |
|
| It is also a good idea to keep a known good parts on your bench, for testing only. There are reports of even NEW parts being bad. So you have to keep known good flexes on hand at all times, so you don't waste your time troubleshooting with possibly bad flexes.
| | == Reference measurements (also schematics if available) == |
| | <gallery showthumbnails="1"> |
| | File:Example measurement pictures.jpg |
| | </gallery> |
|
| |
|
| In scenarios where you have the appropriate flexes plugged in, but it still restarts, then you either have:
| | == More Information/External Sources == |
| *Bad or damaged flex
| | <!-- |
| *Low quality aftermarket flex
| | You can manually link to external sources for additional information that might not fit here but are useful such as BIOS image dumps, firmware, etc! |
| *Other flex cables that are Liquid Damaged
| | --> |
| Please note: You MUST have the required flex cables, plugged in. Otherwise, it WILL restart. You cannot troubleshoot this step by unplugging the bad flex.
| |
