Chosen Solution
So here I have an iPhone 5C that is now stuck on apple logo then shut off, which is what you would expect when a battery is not plugged into the phone and you plug the charging cable in. Seems to look like not detecting battery. Components C23 and C25 are knocked off. These are both capacitors that are right above the battery connector. Are both those capacitors required for the iPhone 5C to boot? These capacitors go to ground and are used for PP_BATT_VCC. If they are required for phone to boot, then I’ll just take the capacitors from an iPhone 5s which are the same. It won’t stay on in recovery mode, it cuts off very quickly even while plugged in recovery mode. I have tried another battery by the way. Edit: I have concluded it is probably either NAND chip or Baseband chip. Are they both the same thing?
Hey Ben, I missed this while I was away and just wanted to give a quick answer…even though the phone is probably now long gone. C23 & C25 are on the PP_BATT_VCC rail as you say. They are there for filtering out noise and transient signals on this rail. They are not “required” for the phone to boot but I would replace them once everything else appears to work properly. If your phone is not booting properly, then there is probably a bad or shorted voltage rail somewhere on the board. It could be causing an important subsystem from completing the bootstrapping or pulling down one of the power management IC’s. You really have to probe them one by one until you find the problem.
Those capacitors help the phone detect the battery, did you put new ones on and try to boot? What makes you think is the nand or the baseband? they are not the same thing, one is for storage the other one is for network
