Evank, sorry should have read the op more carefully.
Based on your system pics could it be caused by your centre sound bar speaker located below your TV?
Note that my TV is located as close if not closer to my tonearm than yours and I have no hum issues. Mind you my arm is shielded.
On the basis that the source may not be the TV, try running the TV without the cable or satellite decoder or any other device used in conjunction with the TV.
Hope this helps