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.
ACF is listed as a rare disease by the Office of Rare Diseases (ORD) of the National Institutes of Health (NIH). This means that ACF, or a subtype of ACF, affects less than 200,000 people in the US population. Source - National Institutes of Health (NIH) ACF as a Disease. ACF: Another name for Cayler syndrome (or close medical condition association). Â»Introduction: Cayler syndrome Â»Symptoms of Cayler syndrome. ACF: Related Diseases. ACF: ACF is listed as a type of (or associated with) the following medical conditions in our database: Heart conditions; Chest conditions; Circulatory system conditions