I set up my brand new HP Envy 360 laptop last week. I don't have wireless so I have wired cable. This suits me as I never move the laptop from my desk. I noticed last week that even when I power off the laptop at night, the ethernet port stays lit up. I've been told not to worry about it, but I'm wondering if it's causing wear and tear. Could some tell me if it's OK and why it stays on. It's been on 24-7 for a week now, ever since I set up the laptop.