Specifications

iPhone 4 Symptom Charts — Sound Issues 72
2012-02-21
2. Restore with iTunes.
Restore the device using
the latest version of iTunes.
If restore fails, attempt DFU
restore.
Toggle the ring/silent switch.
Is the vibrate issue resolved?
Yes Issue resolved.
No Determine if the issue is caused by
accidental damage. Refer to the Visual
Mechanical Inspection guidelines.
For iPhone 4 (GSM model) only:
Replace vibe motor, if possible, rather
than replacing the whole unit.
Speaker/Receiver Issues
Known-Good Parts & Materials Required: Dock Connector to USB Cable, computer running
the latest version of iTunes with a known-good USB port
Note: The user may report that sound is not playing through both mesh openings on
the bottom edge of iPhone. Only one of the mesh openings is a speaker; the other is the
microphone. The speaker is located on the right side.
Quick Check
Symptoms Quick Check
• No sound from speaker on the
bottom edge of the device
• No sound from receiver
• Distorted sound from speaker
or receiver
1. If issue is with headphone audio, jump to
Headphone Issues.
2. Make sure case or protective lm is not
obstructing the speaker or receiver.
3. On the device, go to Settings > General >
Software Update to verify device has the most
up-to-date software. If unavailable, verify by
plugging the device into iTunes.
4. Check volume level with volume up/down
buttons.
5. Verify that music/audio is not paused.
6. Check Settings > Music (or iPod) > Volume Limit.
7. Go to Settings > General > Accessibility and
verify “Mono Audio” is not enabled (for those who
don’t require it.)