Iphone 4 won't connect to computer all of a sudden

Are you using a PC or Mac?

If you're on a PC, it should make a sound when you plug it in, like all USB devices.

If you're using a Mac, do you have iTunes open, when you plug it in? (although you should have iTunes on either one, if you have an iPhone).

Open iTunes, and see if the phone shows up. It shouldn't take longer than a minute for the phone to show up in iTunes.

Sometimes usb devices like to use the same usb skt, this may or may not solve it, try it, if you only have 1 skt then not..

Same thing happened to me. I downloaded the latest iTunes to the desktop and re-installed it. Fixed the problem. iTunes update won't work since I was at the latest version anyway.

If it makes a sound, that means your computer has seen it, at least, and it's able to connect.

I'd try the following, in the following order.


1) With the iPhone disconnected, hold the Sleep/Wake button AND the home button UNTIL the Apple logo appears. After you hold these buttons down, the slide to power off will appear, but ignore that. Then the screen will blank. When you see the Apple logo appear, let go. Once the iPhone restarts fully, plug it into the computer, and see if iTunes will see it.

2) Repeat #1, but before you plug the phone in, restart your computer. After your computer AND iPhone have fully restarted, open iTunes, then plug your iPhone in.

3) Download and install iTunes over your existing installation. Restart your computer, then plug your iPhone in.

4) Uninstall iTunes fully, and ANY Apple related programs (Apple Mobile Device, etc.). Restart your computer, then install iTunes. Restart your computer again, and then open iTunes and connect your iPhone.

If none of these work, you may have to put your iPhone into either Recovery Mode or DFU mode.

I am having similar issues, but my computer won't make any noise when I connect the iphone.

It is a new computer to me, but it is an older one. I don't know if it is because I haven't synced it with this computer yet or what. Any suggestions?

Did you try my suggestion?

EB, I tried your suggestion and it worked great I was having an issue where my iphone stopped syncing out the front USB ports , but on the back ones was fine. Tried your trick, Boom/___sbsstatic___/migration-images/migration-img-not-avail.png All is well again 🙂

/bows before the master.