crwdns2934241:0crwdne2934241:0 Dan
crwdns2934249:0crwdne2934249:0:
The Thunderbolt bus requires termination. So what happens is the termination circuit fails to either engage or disengage. Here is on the edge which is why plugging in the external resolves the issue. The logic board will need repairs or replacement. A Thunderbolt to DP adapter might be the cheaper way of addressing the problem, just leaving it plugged in.
crwdns2915684:0crwdne2915684:0:
open