Please help if you can. I use two displays with a mid 2014 Macbook Pro retina 13". I use both thunderbolt ports, instead of one HDMI. I have run into an odd problem. Both thunderbolt ports work fine with one of the wires in to the monitor, but the other can only be used in one. When I try and plug it into the first one, no display comes up. Only the second works. When I use the other, both will bring up display. So the cable works fine in one thunderbolt port. But it's as if the other port doesn't like it. Can anybody point me in the right direction on a solution? Thanks.