Hum problem


System hum when cable box is connected. How to get rid of it?
ellyjr
Thank you. I disconnected the cable box, unplug it from the wall, now I connected the cable straight to TV, the hum is still there (the only wire that link to the system is the hdmi cable from Bluray player to TV). It is the cable tv line that cause the hum not cable box. Will the isolator fix this? thanks again
It is the cable tv line that cause the hum not cable box. Will the isolator fix this? thanks again.

If you disconnect the incoming CATV coax cable from the TV and the hum stops, then yes the isolator will stop the ground loop hum.