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.
FORMER KMOV-TV ANCHOR DIES FROM INJURIES IN CAR CRASH: MARY PHELAN BAUDENDISTEL, WHO LEFT TV JOB TO GET MARRIED, `TOUCHED SO MANY PEOPLE'.(News)(Obituary\Profile\Mary Phelan Baudenistel)(Obituary) Former KMOV-TV (Channel 4) reporter and anchor Mary Phelan Baudendistel died Sunday morning from injuries suffered in an auto accident Saturday night. Baudendistel, who turned 37 on Dec. 5, died at 11:30 a.m. at St. John's Mercy Medical Center, and her family donated her organs.