Found the ground loop hum source, how to fix?

Sounds easy enough! Thx

Not sure where the last, extremely thorough response went regarding the NEC grousing but I checked things out today and noticed something very interesting....

I have AT&T uverse service that brings the tv and Internet signal through the phone lines then distributes the tv signals through the existing coax network in my home from time Warner cable.

The time warner box that takes the coax from the street and into the house had the groin wire cut and removed...strange... The box that the uverse uses however is grounded. This box takes a phone line in and a coax out so I wonder if it is all the same or if I should reconnect the cable box ground just to be safe?

I am not sure exactly what happens with the time Warner box but the existing coax network in my house is used with the uverse box. The uverse box also has a coax output that feeds my existing cable outlets...this box is grounded so in theory I should be ok...just strange that someone would go through the trouble of removing the ground from the time Warner box.

There is a copper wire (main earth ground) coming up from along side the foundation that the the uvers ground ties into via a copper block. This is the same junction point for the ground wire coming from the main electrical feed into the house as well.