MacBook Neo Troubleshooting USB-C Issues

• Identify the ports on your Mac

• Adapters for the Thunderbolt or USB-C port on your Mac

• Connect a display to your Mac

1. Inspect the computer for liquid damage. Contact with liquid can short internal circuits and cause the computer to malfunction.

2. Ensure that you’re not exceeding the specified maximum number of supported external USB-C devices for this model. Refer to specifications for more information about connecting USB-C devices.

   • Note: MacBook Neo USB-C ports don't support Thunderbolt. The rear USB-C port supports USB 3 speeds. The front USB-C port supports USB 2 speeds. MacBook Neo supports connecting a single display to the rear USB-C port only.

3. Inspect all USB-C ports and top case openings on the computer for any signs of deformation, damage, or debris that may be blocking the connection.

4. If you find any debris in these ports, gently clean each connector using a small, nonmetallic, 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 connector. Twist the bristles to loosen and lift out debris. Brush debris away from the connector to avoid brushing debris into the connector. Use a microfiber cloth to wipe away the loosened debris.

   • Caution: Before cleaning ports, disconnect all cables and turn off the computer. 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 in port openings as it may drive debris further inside the port.

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. Connect a compatible mouse or keyboard to each USB-C port on the computer to verify basic USB-C port functionality.

3. Ensure that the Mac recognizes the connection with both orientations of each USB-C connector by flipping the USB-C connector over and reconnecting it.

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. Follow repair manual procedures to remove the bottom case and disconnect the battery from the logic board.

2. Inspect internal parts and the enclosure for indications of physical or liquid damage, contamination, or burned or darkened areas. Inspect all relevant internal flex cables and connectors for damage or tampering, such as a film or foreign material blocking a connector.

3. Locate the USB-C boards flex cable connector and verify the flex cable is present and connected. If the flex cable is missing, it may be under the logic board. Remove the logic board to locate the flex cable. The single connector connects both USB-C ports to the logic board.

4. Disconnect and reseat the USB-C boards flex cable connection to the logic board. Then reconnect the battery and retest for the USB-C issue.

5. If the issue is resolved or inspection reveals no issues, complete the reassembly. If diagnostic results or inspection identified a faulty part, continue to the next section. If the issue persists without identifying a specific part, continue to the next section for logic board replacement.

Note: This section requires ordering parts and tools. Replacing a part may not resolve the device’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, run the post-repair diagnostics and perform functional testing to determine whether replacing a part resolves the issue. If it still isn’t resolved, replace the next part.

• Replace the USB-C boards.

• If no specific faulty part was identified above, 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 suite after the repair:

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

After the repair is completed, turn on the computer and verify that known-good USB devices are functional and recognized when connected to all USB-C ports on the computer, in both orientations.

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