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Fourth generation iPhone. Repair is straightforward, but the front glass and LCD must be replaced as a unit. GSM / 8, 16, or 32 GB capacity / Model A1332 / Black and White. This page aims to help users troubleshoot, fix, and seek help for the iPhone 4.

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iPhone not charging when turned on, but charges when turned off

Hey all, I found my old iPhone 4, and I used it for a bit, and I realized that I had some very cool and fond memories on the device, I was gonna export the pictures and videos from the device until I noticed that plugging the device in did nothing. It won't charge, but when you plug it in, turn it off, and leave it, it will charge (I did that before I went to work, and I came back after work and I turned it on, and it was fully charged) but plugging it into a computer will cause Windows to say "USB device not recognized" saying that it malfunctioned. And no, the battery works fine, it does drain a bit fast, but no sudden shut down issues, before it broke, 3uTools reported that it had 88% battery health, the battery I replaced it with was also a used one at 85% health, same as the original one, drains a bit fast but no sudden shut downs.

I have replaced the battery, and the dock connector, I grabbed the charging flex assembly from an iPhone that was locked but I did test it and yeah, that phone did get detected and did charge properly, I put it in to the iPhone that has the issue, not only did it not fix it, but now, when I returned the charging flex assembly back to it's original device, that same device now exhibits the same issue; not charging when turned on, charges when powered off, and is not recognized by the computer when you plug it in to one.

Update (47 minutes after this was posted), I left it plugged in, and I have noticed it charges as fast as it would, only problem is again, it doesn't show that it's charging, and it still can't get detected by a computer.

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First off, stupid question. Did you check the port on the phone? There may be lint

Second, is the cable bent? Knowing that Apple deprecated the 30 pin, it may be hard to find a official charger. Amazon has 30 pin chargers still being made however

If none of these are the problem, there may be a problem with how the phone charges.

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I did try different chargers, and considering I have tried a charging flex assembly from an iPhone I have verified that charges just fine with the same cable, that would rule out the charger or the charger port being broken, I wasn't clear though, so there's that.


Yeah, that may be it. The charger port is dying or the connector itself is broken


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Raine Gillingham zal eeuwig dankbaar zijn.

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