This tester does this and more: https://www.amazon.com/Noyafa-NF-633-DisplayPort-Testing-Continuity/dp/B01MZ4JPZH https://www.amazon.com/Noyafa-NF-633-DisplayP

This tester does this and more: https://www.amazon.com/Noyafa-NF-633-DisplayPort-Testing-Continuity/dp/B01MZ4JPZH https://www.amazon.com/Noyafa-NF-633-DisplayPort-Testing-Con... http://www.noyafa.com/show/364.html http://www.noyafa.com/show/364.html "There's a separate led to test if display port power (pin 20) is connected"