Putting “dummy loads” fixed the problem for me. It’s not pretty, but I’m going back and forth between connecting to a Thunderbolt Display and using my late 2013 MPB by itself… so major hassle, as you can imagine. I keep a tb Ethernet adapter and an hdmi cable attached - and that “spaghetti solution” keeps the mac running for now. It won’t win a beauty contest, but at least it’s up. I hope this helps.
Fichte2
Users receive reputation points by contributing quality content to the forums.
Posts include post and replies published on the forums.
Post authors can mark replies as Accepted to indicate successful solutions.
Apple Developer Forums admins can mark replies as Apple Recommended to indicate an approved solution