[harley52]

I'm new when it comes to receivers. Not new to 2 channel. Anyway, when I plug in that hdmi cable from tv to the rec. I get a big dose of 60hz hum. I'm using a separate amp to power the speakers. I been lucky I guess but only ran into 60hz hum about 100 yrs ago. Any help would be appreciated.
Thanks

[JRace]

Unplug the CATV line and see if it goes away...
if so your Cable TV line is not properly grounded.

[Gzerro]

Your cable tv coax cable isn't grounded properly.

If tracking down the source of the ground loop fails, one of these guys will fix it:

http://www.amazon.com/Viewsonics-VSIS-EU-Cable-Ground-Isolator/dp/B0017I3K9M/ref=sr_1_12?ie=UTF8&qid=1414705266&sr=8-12&keywords=ground+hum+eliminator

[harley52]

Well, that's simple enough. Thanks guys