Chosen Solution
Hi guys, I replaced my cracked iphone se (gen1) screen and after restarting, the battery health says “service”, and it restarts every 3 minutes or so. Everything is connected and I followed the youtube how-to. I reconnected the old screen and a different battery but still have the same issue. I’ve replaced the screen and battery on this phone before (I guess 3rd party parts dont last) but this time I’ve run into this weird issue. Any idea what I can do? Panic log: panic(cpu 1 caller 0xfffffff00dd1af58): userspace watchdog timeout: no successful checkins from thermalmonitord since load\nservice returned not alive with context : is_alive_func returned unhealthy : current 1fffffe, mask 1ffffff, expected 1ffffff. EC: 1 EH: 3758097110 3758097110 SD: 0 BC: 0 RC: -1 BS: 0, Missing sensor(s): TG0B \nservice: backboardd According to panicfull.com, the error description is “Battery is not being detected and identified correctly by the i2c/Swi bus” and offers this advice: Replace Charging Flex with another one of EOM preference.Check charging circuit and battery detection, including the battery itself.Visual analysis of the flex meshes.Battery fpc.Inspection of the loading part.Open Swi/i2c bus. If I plug the phone into an outlet it recognizes the cable so it shouldn’t be the charging port. I swapped batteries and it shouldn’t be that since it restarted with the new battery but gave the same error. I’m not sure what the other recommendations refer to though.
It sounds like you have nudged or knocked of the filter that is circled. Check it under some form of magnification.
If you have disturbed this component and haven’t got the equipment or experience to solder it back on or jump it you can use something like this between the two pads.
Are you sure it’s rebooting at 1 minute intervals? Because normally when an iPhone gets into a boot loop it’s due to the phone being unable to read a sensor, and that scanning cycle goes on at 3 minute intervals. Fortunately, that length of time gives you enough time to check the panic logs in order to determine which sensor has failed. User @flannelist has written an invaluable guide to kernel panics that will help figure out what’s gone wrong with your phone. iPhone Kernel Panics - iFixit Read through that and use it to pull up the panic logs and find the missing sensor; that will point you in the right direction as to what part needs to be replaced. My current thought is to wonder if the flex cable that connects the motherboard to the buttons, rear microphone and flash unit got damaged during your battery replacement if you had to fight with it in the case where the adhesive strips break off and don’t come out cleanly. There’s also the possibility the battery took some damage; either the flex cable or the connector; it has sensors on it as well that will cause a boot loop if the logic board can’t read them. So yeah, grab those panic logs and add them to your question so we can see what’s going on with them and we’ll go from there. You may end up replacing the volume button flex cable and/or the battery, would be my guess, but we’ll know more when we see the logs. EDIT: I finally found a picture of what Chris ( @imicrosoldering ) is talking about. The one he’s worried about is marked with a red square around it, but if you look where the arrow is pointing you will see what it looks like when one is missing.
