Specifications
iPhone 4 Symptom Charts — Connectivity Issues 59
2012-02-21
Connectivity Issues
iTunes Sync Issues
Known-Good Parts & Materials Required: USB Power Adapter, Dock Connector to USB Cable,
computer running the latest version of iTunes with a known-good USB port
Quick Check
Symptoms Quick Check
• Device not recognized in
iTunes
• Device will not sync
1. Verify that cable is securely attached to both
device and computer.
2. Try connecting device to a dierent USB 2.0 port
on computer (not on keyboard or an external
hub.)
3. Disconnect other USB devices from the computer.
4. Verify the device accepts power with a known-
good cable and power adapter. If not, jump to
Battery Will Not Charge.
5. Restart the device.
6. Restart the computer and reconnect the device.
7. For Windows, refer to Apple Support articles
TS1495: iOS: Device not recognized in iTunes
for Windows and TS1567: How to restart the
Apple Mobile Device Service (AMDS) on
Windows.
8. Check for third-party software conicts.
Deep Dive
Check Result Action
1. Inspect dock connector.
Verify that the dock connector
is clean and free of debris or
damage. Clean or x if possible.
Is the dock connector clean
and free of of debris or
damage?
Yes Go to step 2.
No Determine if the issue is caused by
accidental damage. Refer to the Visual
Mechanical Inspection guidelines.