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.
In the fall of 1818, nearly two years after Thomas Lincoln had moved his family to the Little Pigeon Creek settlement in Southern Indiana, Abraham's mother became desperately ill after caring for some neighbors who were sick. Nancy Hanks Lincoln died of Milk Sickness about two weeks later on October 5, 1818.