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.
Samuel Emory Davis was the Davis's first child. He was born at Brierfield on July 30, 1852. He was named for Jefferson Davis's Father. Just short of his 2nd birthday, Samuel caught the measles and died in Washington on June 13, 1854. They say he was exposed to measles when Varina's brother, Becket was staying with the Davis family. Becket's school was closed due to measles epidemic. The Davises (Jefferson and Varina) were shattered by this lost.