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 1897, Sarah Seelye joined the McClellan Post and became a member of the Grand Army of the Republic-the only woman ever admitted. Sarah Emma Edmonds Seelye lived the rest of her life in La Porte, Texas, where she died of malaria on September 5, 1898, at the age of 56.