We had the modem replaced today and every other component remained the same plugged into the same place and the hum is completely gone. It was just a faulty modem that began to generate hum when it went bad. In response to Jea, I live in Manhattan in a large apartment building, so all grounding issues are out of my hands and only licensed professionals are allowed to work on anything in the building. NYC’s department of buildings views property owners as a huge source of income through penalties and fines so I’d be surprised if everything wasn’t strictly to code.
Thanks everyone for their thoughts and time spent responding to me. If you hadn’t asked the questions you did, I wouldn’t have been inspired to get more scientific and really eliminate each possible cause of the noise to discover its source.
Thanks everyone for their thoughts and time spent responding to me. If you hadn’t asked the questions you did, I wouldn’t have been inspired to get more scientific and really eliminate each possible cause of the noise to discover its source.