Apple Cinema Display 30" - Detected but not powering on

Hi there,

I just purchased two Apple Cinema Displays - both "30". I checked each display before I bought it -- worked perfectly. However, after driving home with the displays and plugging each into my MBP M1 via a separate USB-C to Dual DVI adapter, one display works perfectly (and is detected as Cinema HD), but the other display is showing just a black screen, and the LED power indicator is also dark, and is detected, but not as a Cinema HD display, but as "Display". Any ideas on what I should do?

This is what the System Information shows:

Apple M1 Pro:

  Chipset Model: Apple M1 Pro

  Type: GPU

  Bus: Built-In

  Total Number of Cores: 14

  Vendor: Apple (0x106b)

  Metal Family: Supported, Metal GPUFamily Apple 7

  Displays:

Cinema HD:

  Resolution: 2560 x 1600

  UI Looks like: 2560 x 1600 @ 60.00Hz

  Main Display: Yes

  Mirror: On

  Mirror Status: Master Mirror

  Online: Yes

  Rotation: Supported

Display:

  Resolution: 2560 x 1600

  UI Looks like: 2560 x 1600 @ 60.00Hz

  Mirror: On

  Mirror Status: Hardware Mirror

  Online: Yes

  Rotation: Supported