iPhone 4 stopped showing in iTunes, what can I do?

[danetello]

My iPhone 4 has recently stopped showing up in itunes. It was working perfectly before and I dont know what could have caused this. I have tried to:

Restart iphone
Restart computer
Re-install itunes
Changed USB cable
Used different USB port
Did a system restore on my PC

But none of these have worked . I connected the phone to a different PC and it showed up, so I am not sure what the problem could be. I have also put the phone in DFU mode and it showed on my computer.

Is there any other way to fix this?

 

[Resist]

It almost sounds like your computer's USB ports are disabled.

 

[mikelegacy]

My iPhone 4 has recently stopped showing up in itunes. It was working perfectly before and I dont know what could have caused this. I have tried to:

Restart iphone
Restart computer
Re-install itunes
Changed USB cable
Used different USB port
Did a system restore on my PC

But none of these have worked . I connected the phone to a different PC and it showed up, so I am not sure what the problem could be. I have also put the phone in DFU mode and it showed on my computer.

Is there any other way to fix this?

You put the phone into DFU mode and it DID show up on the computer? If so, then your ports are not disabled. You may have to restore the device.

By the way, is the phone jailbroken?

 

[danetello]

You put the phone into DFU mode and it DID show up on the computer? If so, then your ports are not disabled. You may have to restore the device.

By the way, is the phone jailbroken?

No, the phone is not jailbroken. If I do have to restore the phone, is there any way to back up the data (contacts, calender events, app data) without itunes?

 

[danetello]

Ok so I have restored the iPhone but now on the screen it shows that I need to connect the phone to itunes. When I plug it in, nothing happens!

What shall I do?

 

[Resist]

Again, I think the USB ports on that computer are not operational.