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.
White-nose syndrome (WNS) is an emerging disease in North American bats which by 2012 was associated with at least 5.7 million bat deaths. The condition is named for a distinctive fungal growth around the muzzles and on the wings of hibernating bats and was first identified from a February 2006 photo taken in a cave in Schoharie County, New York.