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[SOLVED] E7470 HDMI don't work on 10.13.4


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Known issue already from my E7470 guide


Known Issue & Workaround:

HDMI-Output works but if connect HDMI-Cable the local Display goes off and never appears.

I had tried different configurations but none panned out. Here's a workaround:

Close the LID until you see the HDMI display becomes the primary display, then open the LID. 

It'll switch LCD as primary and projector as secondary.

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