Is there any chance to check faulty cables?
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?