Chosen Solution
Hello my iPhone 6 is boot looping and sometimes showing a red screen for about a second. What I’ve tried so far: booting phone with front camera assembly disconnectedbooting phone with battery disconnectedreplacing front camera assembly with a brand new onebooting with home button disconnectedbooting with screen + home button + front camera assembly disconnected (iTunes will not detect the phone, PC will not detect the phone, assuming it was still boot looping) I’m not sure what to try anymore. Everything looks fine on the inside. When I try to boot the phone, the Apple logo appears, seems to go dimmer for a second (as if power was being sucked out of it), the logo disappears. This keeps repeating, with a red screen sometimes showing.
Have you tried putting the phone into recovery mode and do an update and/or restore through there in an attempt to unbrick it? Red Screen of Death after the troubleshooting you have done either points to corrupted firmware on the phone or a NAND flash eMMC chip failure (The memory chip on the logic board that holds user data and the iOS system firmware). Hopefully it is just corrupted firmware meaning the phone will work normally again after updating or restoring the phone. Worst case scenario the eMMC chip has gone bad and needs to be reballed, reprogrammed or even replaced which requires someone with board-level repairs / microsoldering experience to do. To put an iPhone into recovery mode you hold the home button while it boot loops and is connected to computer until you see the iTunes logo. Then iTunes or 3UTools will prompt you that the iPhone is in recovery mode and needs to be updated or restored. Try update first and if that fails try restore. Note that restore wipes all data on the phone.
