How do I resurrect a Thunderbolt display? So I have a 27" Thunderbolt in my office that somebody else used to use. Now it is considered "broken", but I think it can be made to work. Here's a rundown of its current state:

I can connect it to my MacBook Pro, and the computer recognizes the display. It shows up on the "Arrangement" tab. It has working USB ports when I connect its USB cable. Even its speakers work. But the display is completely black, doesn't even turn on or flash.

What do you think can be done to fix it?

Thank you.
I have had a similar issue a few weeks ago. In my case the screen was not "completely" black, but it was close. Going to the "Display" tab in the settings app and turning up the brightness did the trick.

However, it may also be an actual hardware failure if there is nothing at all visible on the screen. In that case you should take the display to an Authorized Apple Service center.

In the pulldown, select Mac repair since these require the same training, tools and skill to repair as an iMac does.