Cinema Display is not working. I have 2 27" Cinema Displays today one of them is not working. I checked the power cables, but they do not seem to turn on. I was working yesterday, and now I'm not. Is there a re set for this I will not wake up.
Mac Studio, macOS 26.1
There are TWO displays, commonly mistaken for each other that appear to have a Thunderbolt-2 interface.
The Apple Thunderbolt Display 27-in A1407 is a 2560 by 1440 display that has a lead in cord with ONLY TWO connectors -- Thunderbolt-2 and MagSafe.
This display works great with the Apple ThunderBolt-3 <-> Thunderbolt-2 adapter, US$50.
In addition to the built-in Thunderbolt cable, the display also has a built-in MagSafe-2 connector that charges an older Thunderbolt-equipped MacBook Air or MacBook Pro.
from:
https://everymac.com/monitors/apple/thunderbolt/specs/apple-thunderbolt-display-27-inch-specs.html
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Cinema display LED 27-in A1316 from 2011 is a 2560 by 1440 display that features lead-in cord with three connectors -- Mini DisplayPort, MagSafe-2 and a USB-A pigtail. It does NOT work with the Thunderbolt adapter, but works fine with a USB-C to miniDisplayPort adapter.
It includes three USB 2.0 ports and a convenient single cable with THREE connectors (Mini DisplayPort, MagSafe-2, and USB 2.0), a built-in iSight camera with a mic and a 2.1 speaker system.
This display works great with a USB-C to MINI-DisplayPort adapter.
from:
https://everymac.com/monitors/apple/studio_cinema/specs/apple-led-cinema-display-27-inch-specs.html
If both displays were working yesterday - on the same Mac, with the same adapters - that suggests that you have the right adapters.
It also might be a sign that the display that isn’t working has suffered a hardware failure. The 27” Cinema Display and 27” Thunderbolt Display are now both pretty old displays.
Cinema Display not working
