Apple Studio Display - Black Screen with Apple Studio Mac

Hello, I have an Apple Studio Display connected to a Mac Studio, with Apple M2 Ultra chip, running Sonoma 14.6.1.

This Studio Display is one of two on the Mac Studio. I purchased the first one, which is running fine, directly from Apple. The one that is not working was purchased a week or ten days ago from Other World Computing (OWC), so it is a "used" Mac Studio Display.

I can't get the OWC display to start up. All I get is a black screen.

I have made numberous attempts to get the monitor st start up. That would include:

• disconnecting the thunderbolt cable from the monitor, waiting ten seconds, and then reconnecting the cable.

• Using Apple's online support as a guide, I started up the Mac and after wating for about a minute I sent to system Settings/Displays … and then holding down the Option key while clicking on "night Shift to reveal "detect displays". None of these attempts to fix the problem and get the Studio Display to start up worked.

Any suggestions appreciated.