A1708 - no HDMI output
Let’s start with the fact it’s not my original Logic Board, and I don’t know it’s history. My LB died some time ago, I've ordered a couple of boards and began to inspect which of them will stay with me.
LB 2016, 2GHz - work’s fine
LB 2017, 2.3GHz - work’s. Except, it takes a while longer to boot (strange) and neither detects external screens or outputs any signal.
I’m more than certain it’s a LB’s fault, as it was tested on multiple dougles, multiple cables and two screens. What could be cause of that?