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.
Marley was diagnosed with a brain tumor (a result of the untreated cancer in his toe) and given less than a month to live. Marley played one final show in Pittsburgh before being flown to Miami. There doctors verified that the singer had cancer in the brain, lung, and stomach. Eight months later, Marley passed away.