Hi Dan,
Based on your description of the issue where you are not hearing any audio coming from your two bookshelf speakers, below are some helpful troubleshooting steps we can try to determine if this issue is coming from the dock or another source.
1. Verify Docking Station Audio Output:
Test by plugging in headphones to the AUX output of the Plugable dock. If headphones work, the issue might be with the RCA to AUX connection.
2. Check RCA to AUX Connection:
Ensure the RCA cables are properly connected (Red = Right, White = Left). If using an RCA-to-3.5mm adapter, try a different one.
3. Test a Different Audio Source:
Connect the bookshelf speakers to another audio source (e.g., phone, another laptop) to confirm they are working.
4. Reinstall DisplayLink Drivers (If Dock Uses DisplayLink):
If the Plugable 3.0 dock is DisplayLink-based, reinstall the latest DisplayLink macOS drivers from Plugable’s website.
5. Test on Another Computer:
Connect the Plugable Dock to another Mac/PC and see if audio works. If audio works on another device, the issue is likely macOS-related.
6. Restart the Core Audio Service:
Open Terminal and type:
sudo killall coreaudiod
Press Enter, then test the audio again.
Next Steps:
If none of these steps resolve the issue, the dock’s audio output may be faulty. In that case, we ask that you please feel free to reach directly out to our Support Team at support@plugable.com and please reference case #461150 so we can help provide our next best options.
Thanks,
Michael S.