They obviously still work so that the Mac can detect the board’s ID, but the OSD can’t make the input selection be set. So no video can get to the screen. 🙁 Good idea to try another cable. Or a USB-C monitor cable. But if you say an HDMI cable doesn’t work then maybe...
Using Raman spectroscopy to detect and monitor freezing and melting processes in near-saturated water-salt mixtures at Mars-analogue temperaturesMason, D. P.Madden, M. E. ElwoodLPI Contribution