Recover broken screen MacBook from external display?

Ben Vietnam,

That's good to know that the hub works when connected to a different Mac. To rule it out being an issue with your MacBook Air, are you able to directly connect it to your Mac, without using the hub? If so, does an image appear then? Let's also reset the System Management Controller (SMC) as that can help with issues with power to the USB port, if that's what's happening. Here's more information on the SMC and how to reset it: How to reset the SMC of your Mac

Keep us posted.

Best regards.

Hello Ben Vietnam,

Thanks for visiting Apple Support Communities. We understand that you're having a display issue with your Mac, and after restoring it you're no longer able to use an external monitor. Ar you using an adapter to connect the display to your Mac? If so, check out the steps under "Check your cable or adapter" here: If your external display isn't detected or appears blurry on your Mac

If those steps don't help, let us know more details:

• If you're using an adapter, which one are you using specifically?
• Does the same behavior happen if you use a different display?

The more details you can provide the better.

Take care.