Why are my displays going into standby with VS221HD20 / VS421HD20 ? - StarTech.com IT Pro Community
<main> <article class="userContent"> <p>Turning off one video source, such as a Blu-Ray player, may cause all displays on the output ports to enter standby mode. This is a feature of Consumer Electronics Control (CEC) and to avoid this behavior you will need to disable CEC on the video source.</p> </article> </main>