Chosen Solution
Hey guys! I have an iphone 6 here that crashes and reboots after about a minute of use. I wasn’t able to restore it until I tried with the screen removed, so it appears that its stable without the screen. The backlight circuit looks good, vcc main is free of shorts. There is no trace of water damage or burned components. I’ve tried replacing every external component, so I’m pretty sure it’s a board level problem, but I’m at a loss at this point. Any ideas as to where I should start poking round?
Try screen without front cam assembly and without home button. If it crashes, try a different known good screen. If not, connect the screen with home button and repeat test. Next is the front cam flat cable. Isolate which part of the screen is causing this issue and try a known good replacement. Regarding the home button, it could be the home button itself or the extension cable running in the screen metal plate. And replacing the home button itself will cause the loss of Touch ID.
You can connect the device to iBackupbot and try to see if there is a specific error message that occurs just before the crash. iBackupbot has a real time log section.
