Exchange If Its An ACP70
Laurence,
I suspect you have a dodgy dock. That is, some ACP70 have an inductor value that has drifted over time enabling a ringing on a low power input rail to the DisplayLink device that will at times start and others not, an intermittent.
I recommend you exchange the dock for a new one. Targus' factory has modified the hardware and fixed the issue.
If it is not an ACP70, then post back.
DocKtor
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