Chosen Solution
After a year of not using my 27” Thunderbolt Display, i plugged it in and get only a black screen. However, i do get the mag safe plug to charge the laptop. “Green light comes on” I have tried the screen on another laptop as well as my Mac Pro. Same results. I have 3 options to replace… Power cord, Logic Board, or Power Supply Board. What do i replace without spending myself silly?
Here’s how Apple recommends trouble shooting it: Get help with video issues on external displays connected to your Mac https://support.apple.com/en-us/HT201177
Easiest and least expensive replacement would be the all-in-one cable. I think that is worth a try as it does not cost a fortune and it does not take much experience to replace. https://www.ebay.com/p/OEM-Thunderbolt-D… Apple Thunderbolt Display Thunderbolt & MagSafe Cable Replacement
