LG Ultrafine 5k 27MD5KA-B



==== This model seems to have a prone-to-dying Texas Instruments USB-C PD + Thunderbolt multiplexer controller "TPS65983" as ive seen two (suspecting 3) models with it being the cause of the display not working. Issue can stem from other places as well, like power supply (fuses etc). ====

External references and other people having issues:

People complaining about loose main port: https://maker.pro/forums/threads/lg-ultrafine-27md5ka-b-provides-power-to-laptop-but-does-not-get-detected-by-computer-no-video.292861/

Cable issues: https://discussions.apple.com/thread/252555535

Francis (Francis#2054 on discord): These are my own observations, but a quick google shows others having similar issues.

I have had 3 identical models in for "not starting".

Display 1: Testmode works, fixed by replacing TPS65983

Display 2: Testmode works, replacing TPS65983 has not fixed it

Display 3: Testmode does not work, fuse "F100" faulty, not fixed yet (Jan 30, 2023)