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Apple Thunderbolt Display Troubleshooting - iFixit
https://www.ifixit.com/Wiki/Apple_Thunderbolt_Display_Troubleshooting#:~:text=Your%20display%20is%20working%20fine%20but%20you%20cannot,If%20the%20problem%20continues%2C%20try%20restarting%20your%20computer.
No sound from Thunderbolt display - Apple Community
https://discussions.apple.com/thread/3669283
2. Unplug Display(both power and thunderbolt connection) for 15 sec or so. 3. Press & Release Shift+Control+Option+Power. 4. Wait for 15 sec or so. 5. Plug back display and power. 6. Power. This trick works for me. But I hate to do it every time this problem comes up, which seems the only way for me to get display audio back to work.
No sound from Thunderbolt display - Apple Community
https://discussions.apple.com/thread/3669283?page=2
Some times you have the plug out the thunder bolt cable for a few seconds and plug it back it to pick it up. The display might work, but it may not always give out sound. When the sound does not work, then none of the USB ports do not work. It's a major pain when you have printers connected to the screen.
macos - How can I troubleshoot no audio via Thunderbolt ...
https://apple.stackexchange.com/questions/92493/how-can-i-troubleshoot-no-audio-via-thunderbolt-hdmi-connecting-to-hdtv
Try setting your "Use audio port for:" to Sound Input, as it may be hogging the audio out channel and not letting your thunderbolt use it. Make sure your system volume is turned up there too. If you have various sound drivers installed and showing up in Audio MIDI Setup, just leave them alone for now, and DO NOT use any aggregate devices.
Apple Thunderbolt Display Troubleshooting - iFixit
https://www.ifixit.com/Wiki/Apple_Thunderbolt_Display_Troubleshooting
No video on Thunderbolt Display, but audio works. Bad ...
https://www.ifixit.com/Answers/View/602944/No+video+on+Thunderbolt+Display,+but+audio+works.+Bad+power+cable
No audio on Apple Thunderbolt display built-in speakers ...
https://www.tonymacx86.com/threads/no-audio-on-apple-thunderbolt-display-built-in-speakers.228336/
Hallo Toleda, I am finally using the Apple TB display. It works trough the TB3/usb-c using an official adapter TB3 to TB. The audio video goes undoubtedly through the thunderbolt signal, which when it starts up properly, is solid.
How to Use and Troubleshoot Dell Thunderbolt Docking ...
https://www.dell.com/support/kbdoc/en-us/000130291/how-to-use-and-troubleshoot-dell-thunderbolt-docking-station-wd19tb
External monitor connected via USB-C/Thunderbolt 3 has …
https://www.dell.com/community/XPS/External-monitor-connected-via-USB-C-Thunderbolt-3-has-no-signal/td-p/7770233
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