Q: iPhone 4 is not connected to pc

Hello there Darria,

If I understand correctly it sounds like your phone makes a sound when you plug it in, but it doesn't appear in iTunes or Windows Explorer. I recommend the troubleshooting from the following article, named:

iPhone, iPad, or iPod touch not recognized in iTunes for Windows

Start with these steps, and use the rest of the article if you need it:

Restart

Turn off your computer and your iOS device, then turn them on again.

Update your computer

Check to make sure that you've installed all required updates for your computer.

Update iTunes

Check that you have the latest version of iTunes installed on your computer.

Make sure your iOS device trusts your computer

 

If you connect your iOS device to your computer and see "If you have not connected your iOS device to this computer before, unlock the device and tap Trust," make sure that your device trusts the computer.

If you use Windows XP and you see the trust alert on your device repeatedly, make sure that you installed iTunes. Learn how to resolve a repeating trust alert when using Windows XP. You might need to reset the lockdown folder.

Thank you for using Apple Support Communities.

All the best,

Sterling