Chosen Solution
I went to replace a battery on an iPhone 5S, it obviously should have been a simple replacement but i went to reassemble the phone and it was dead. I have replaced every component to find the issue, the lock button flex, charging cables, screen, different batteries… no avail. I believe it is a logic board issue but I have no idea which part or how to fix it. Is there something that a faulty battery or battery replacement could do to brick a 5S? Any help would be greatly appreciated.
Try the original battery again.
Check the LCD connections. I usually don’t remove the screen when doing a replacement.
It’s not unfathomable that a third party battery could damage a motherboard. Why not try removing the board and placing in another 5s that you know works? It’s the quickest way to eliminate other possibilities? Good luck
Hi, I had a similar problem with an A1533 where the battery completely died. Think it was caused by overheating as the front panel w/LCD was detached from its frame!! I jump started the battery using hooked pins and an external low current charger from an old defunct phone pack but had to take it out of the frame to get to them however this worked fine and phone starts/runs with battery at about 20% The 5S and 5C batteries are very similar but not identical, even if it fits in the available space its connector is wrong. You might have damaged it in the process so worth checking under a magnifier for bent or missing pins, or a cracked connector housing.
