Mac Modular Desktops Troubleshooting Sound Issues

• Use the ports on your Mac

• If you can’t hear sound from your Mac speakers

• If the internal speakers on your Mac aren’t working

1. Unplug any headphones or external speakers.

2. Ensure that cables or other objects aren’t inserted into the headphone jack.

3. Visually inspect the headphone jack to identify any debris inside the headphone jack.

4. Clean the computer. If you find any debris in the headphone jack, gently clean this area using a small, non-metallic, soft-bristled brush. Ensure that the brush is clean and dry. Gently brush out lint or debris. Use just enough bristles to fit inside the headphone jack. Twist the bristles to loosen and lift out debris. Brush debris away from the opening to avoid brushing debris into the opening. Use a microfiber cloth to wipe away the loosened debris.

   • Caution: Unplug all cables and turn off the computer first. Don’t use aerosol sprays, solvents, abrasives, or cleaners containing hydrogen peroxide that might damage the finish. Don’t use any metal objects to clear debris or obstructions, as this can short the connector and cause damage. Avoid getting moisture in any openings, and don’t spray liquid directly on the computer. Don’t use compressed air.

5. Refer to steps and support resources in Troubleshooting Quick Checks.

If the issue wasn’t resolved by following a support article or trying the quick troubleshooting steps, run these manual and diagnostic tests to help isolate the cause of the issue:

1. Run the Mac Resource Inspector (MRI) diagnostic suite.

2. Run the Audio diagnostic suite. This interactive diagnostic suite plays a set of chordal tones through the built-in speaker and prompts the user to verify that the tones are audible and not distorted.

   • Note: This diagnostic suite requires headphones to check the headphone jack.

If the issue wasn’t resolved or isolated by following support articles or running diagnostics tests, refer to the computer's repair manual to open and inspect the computer. A damaged or out-of-place part may be causing one of the issues.

1. For speaker issues in all models, inspect speaker cable connections to the logic board. Reconnect any loose connections and retest.

2. For Mac mini headphone jack audio output or input issues, inspect the audio board connections to the logic board. Reconnect any loose connections and retest.

3. For Mac Studio headphone jack audio output or input issues, inspect the combination I/O board connections to the logic board. Reconnect any loose connections and retest.

Note: This section requires ordering parts and tools. Replacing a part may not resolve the computer’s issue. You can find other service options at support.apple.com/repair.

If the issue wasn’t resolved or isolated by following the previous steps, replace the following parts one at a time in the order shown. After you replace the first part, repeat the troubleshooting steps to determine whether replacing a part resolves the issue. If it still isn’t resolved, replace the next part.

• If you find damage in the headphone jack, or if the issue is isolated to the headphone jack, replace the combination I/O board in Mac mini and Mac Studio models. Replace the Apple I/O card in Mac Pro models equipped with this card.

• If the issue is isolated to speakers, replace the speaker or speaker pair (depending on the model).

• Replace the logic board.

Repair completion

Depending on the part replaced, Repair Assistant may be available on the device to finish the repair. Learn how to initiate Repair Assistant.

Post-repair verification

Run the following diagnostic suites after the repair:

• Mac Resource Inspector (MRI) (to test overall functionality) (SSR)

• Audio diagnostic suite

After the repair is completed, turn on the computer and connect and disconnect headphones or external speakers. Verify that audio can be played through both external and internal speakers, and that sound is clear and free of distortion. Connect an external audio source, such as a headset with microphones. Verify that external audio input is available, selected, and functional and that the input level indicator moves when speaking into the external microphone. Then record a sample audio file and play it back to verify that it is free of distortion.

Note: This section requires ordering parts and tools. Replacing a part may not resolve the computer’s issue. You can find other service options at support.apple.com/repair.