hEX S "RB760iGS" to hEX S "RB760iGS" sfp1 vlan trunk.

You did not specify what you are trying to do (requirements) nor what the actual problem is (besides bricking the device ?) ?
Neither did you show the config which you are trying to apply.

You may want to start with all that, otherwise there is not a lot anyone here can do apart from guessing.

As far as VLAN setup is concerned, this is the de facto guideline around here for that subject:
http://forum.mikrotik.com/t/using-routeros-to-vlan-your-network/126489/1