第四代iPhone。维修过程直观易懂,但前置玻璃和LCD面板无法分开,只能作为同一零件更换。GSM版本, 8, 16, or 32 GB 容量 / 型号 A1332 / 黑色或白色

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Is there any chance to check faulty cables?

Hello everybody,

I try to repair my old iPhone 4. It only show me the the iTunes logo. When I try to reset it with iTunes, I got error code 4013. I tried 3 PCs (Mac and Windows) all where clean and without antivirus software but always the same error.

So I decided to open the phone but all connections looks good. I replaced the battery and the connector port.

Is there any chance to check the connectors or cables to find the error?

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I'd try all the steps in this list before attempting hardware repair.

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Hi Rany, thanks but there is no information, how to check for faulty cables. In the comments, I found an interessting hint to disassemble the front camera connector.

Nope, to rule out defective cables, unplug them all, plug in the battery, the charging dock, and start the phone (by hooking it to a charger).

See if you can restore with this minimal set-up.

If not, try a different charging dock, or better yet (if possible), transfer the logic board to a known good phone, hook everything, and try to restore.

In my modest opinion, the 2 cables that may cause an issue for the iPhone 4 would have to be the charging dock, and may be the power button cable.

Next step would be to check the logic board for missing/damaged/part-removed or corroded components, especially around the connectors on top (cameras, screen, power, etc.), middle (charging dock), and bottom (battery).

Hey Rany, is it really possible to start the iPhone only with the battery and docking port? I mean without the screen, antenna and the other parts? I thought all components must work to use or restore the device.

If this methode really works, that would be awsome and possible to find faulty parts. :)

Sorry, you need the screen too. Yes, you can try a restore with only the dock, screen, board, and battery. Press & hold Home Button, and while doing so plug your phone into your computer, it should start in recovery mode. Release Home Button and start the recovery process. My money though is on hardware issues on the logic board, but trying this restore is not gonna cost you anything, so why not. And to make the trouble shoot complete, you ought to try a different known good charging dock if the phone fails to recover with the one you are currently using. You could also try to clean the prongs of the charging dock (where the sync cable is inserted) with a soft toothbrush dipped in 90%+ isopropyl (rubbing) alcohol.

Thank you again Rany. I'll try it out in the next days and will report. The charging dock is brand new like the battery. I really hope its only the front cam, Antenna or so.

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Hello,

Have you tried with another charging USB cable?

Error code 4013 means there's a hardware problem.

When did it start doing this?

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Hey, yes I tried out 3 diffrent original Apple cables.

One night I went to sleep and in the morning, the phone was dead. I tried to start it but nothing. After some minutes on the recharger, I got the iTunes logo.

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Are you using the usb ports at the rear of the computer, as the front ones can have a tendency to not play ball. I've had an ipod 4th gen and an iphone 4 not work on the front, but works on the rear.

Else, try using google for changing itunes host file, as this has worked once for me too.

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Hey Duane, I used both USB sides and the host file is clean. FW are antivirus are disabled.

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