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.
Last year, Prison Break star Sarah Wayne Callies got into a contract dispute which ended in her character's untimely death. Fans of the television show were outraged, particularly at the way Dr. Sara Tancredi was killed. Early on in season 3, Lincoln was shocked to find Sara's head in a box, courtesy of The Company. She was killed after Lincoln attempted a daring rescue attempt to free her as well as his son, LJ. Well, Prison Break fans, all is not what it seems.