Q: Itunes gets an invalid response from my Iphone which keeps my from synching music

Greetings flightdeck4,

After reviewing your post, it sounds like you are getting an invalid response error from iTunes about the iPhone. I would recommend that you read this article, it may be able to help the issue.

Get help with iOS update and restore errors - Apple Support

You might also see a message that includes "invalid response."

If the USB connection between your device and computer is interrupted, you might not be able to update or restore.

To narrow down the issue, try different equipment:

• Use the USB cable that came with your device, or a different Apple USB cable. 
• Plug your cable into a different USB port directly on your computer. Don't plug it into your keyboard.
• Try a different computer.
• Solve other issues with the USB connection, then with your security software.

 

If you still see the error message, check for hardware issues.

Thanks for using Apple Support Communities.

Take care,

Mario