Bought a phone off eBay, I powered it with my battery on my iPhone 5c (as it didn't have a battery) I then purchased a battery for it, battery works fine (powers my working phone) so I tried to charge it and didn't work, so I replacement the charging port. Now the phone just keeps restarting. The battery is fine, and I have reaplced charging ports before and not had this issue
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There's a group of 5 or 6 capacitors (possibly more depending on which board you have) between the battery socket on the board and shield covering the components, check to see if any have been knocked off or loose because that is one of many reasons that will cause the behavior described....I suggest this only because you mention a battery and charge port swap and it is a common accident when doing those repairs.
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I have 3 iPhone 5cs, one is perfect condition, the other 2 are both acting in the same way as described above. One of them has all capacitors in tact. The other has one missing, what is the repair for this? Also, any other ideas for the other phone with the full amount of capacitors ?
You will need the exact board number as there are two iPhone 5C boards (820-3581 or 820-3329) to acquire the schematic/component views so you can identify the ONE component in that group that is a filter NOT a capacitor. I usually pull components from dead boards to fix working ones.
As for the one with all caps intact I'd go for the U2 charging IC...that's usually the culprit when you have this behavior.
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