The HPNA light is only on if a device is using that connection, usually a STB connected via coax (can be over twisted pair in rare situations like apartments). It sounds like your setup uses ethernet which would not turn on the HPNA light.
The previous scene is an excerpt from Brain on Fire: My Month of Madness, and just one of many hallucinations Susannah Cahalan experienced in 2009 during her month-long hospital stay, in which she was diagnosed with a rare neurological autoimmune disease, known as anti-NMDA receptor encephalitis.
By 1950, when Henrietta Lacks walked into Hopkins Hospital complaining of abnormal bleeding, George and Margaret Gey had spent almost thirty years trying to establish an immortal human cell line. With this, they hoped to find a human model that researchers could study and manipulate for multiple generations so that someday they might find a cure for cancer.