I assume you mean DisplayLinkManager service?
When I restart it (I do Win+R and type services.msc), the extended screen does the same as the fault -- it shows 'PC 1920x1080' for a few seconds which shows it is 'live' but it remains black. Occasionally when trying things you see the cursor duplicated to the screen but not anything else.
Is the driver version not being 7.4.x what you would expect?
Thanks
Rick
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