Found the ground loop hum source, how to fix?

i had a hum induced by an unshielded interconnect from preamp to amp. when i replaced that cable, with another, which was shielded, the hum disappeared.

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.

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...
03-14-13: Kooshballa

Kooshballa,

Really? And where is the ground wire from uverse box ground block connected to the main electrical grounding system of your home?
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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.