Help to restore iPhone 4 charge circuit please.
Hi
The iPhone charged at first, then one time after it draining completely I turned it on to find that it wouldn't charge, when plugged in the % would drop. To add to this when shut down it would now stay hot and drain.
I replaced the battery, dock connector and still no charging. Was going to get it sent off for a new power IC until I decided to open the motherboard up.
Under the metal casing I found a lot of green gunk/corrosion which I assume was from water damage.
This was located at the bottom near the antenna and blue capacitor but inside the charge circuits.
I cleaned this out with a toothbrush a alcohol, first it didn't help, but after leaving it soaked in alcohol for a bit and drying it it began to charge again!!
It now works, but charges incredibly slowly and is quite hot. Is there a way that I can make sure the corrosion doesn't come back and a way to hopefully speed up charging? It's all hardware related.
Many thanks.
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댓글 2개
Thanks for the reply I've added pictures. The green is where it was all gunky. And FYI the crack in that chip wasn't there until I took it apart and accidentally did it so it's got nothing to do with the issue. And yes I removed the EMI shield.
Also it drained again today and won't charge, must have build up corrosion again...
Thankyou
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