Chosen Solution
iPhone 5S stopped booting one day (and its been cracked for a while now with no problems) and when it’s plugged up it’ll show the dead battery symbol quickly show the apple symbol and repeat that process occasionally flashing the whole screen red before repeating that process. What could be causing this issue.
This can be caused by a faulty front camera flex, try disconnecting it and seeing if it will boot correctly. Otherwise it could be the battery, try booting it with a known good battery and see if the issue still occurs
