Hello,
I have a home-built HTPC hooked up to a Samsung flat screen TV. The video is coming out of the DVI connector on the PC video card into the TV's HDMI2 input. The audio is coming out of the sound connector on the back of the PC into the L/R audio inputs associated with the TV's HDMI2 input. The TV and the PC are plugged into the same power strip and are grounded.
It all works great except I have an annoying 60Hz hum on the PC audio.
After trying all possible permutations of plugging and unplugging things, I discovered that the hum goes away when I disconnect the COMCAST cable from the TV.
The cable is coming in from the street directly into the TV (NO cable box). There's some sort of grounding (a pipe and a wire) on the side of the house to which the cable is connected before it goes inside and then into the TV.
I've been doing some reading about this and suspect I might have a ground loop between the cable grounding and the TV/PC grounding. Does this seem right?
Is so, what can I do about it?
Thanks in advance,
Fred
I have a home-built HTPC hooked up to a Samsung flat screen TV. The video is coming out of the DVI connector on the PC video card into the TV's HDMI2 input. The audio is coming out of the sound connector on the back of the PC into the L/R audio inputs associated with the TV's HDMI2 input. The TV and the PC are plugged into the same power strip and are grounded.
It all works great except I have an annoying 60Hz hum on the PC audio.
After trying all possible permutations of plugging and unplugging things, I discovered that the hum goes away when I disconnect the COMCAST cable from the TV.
The cable is coming in from the street directly into the TV (NO cable box). There's some sort of grounding (a pipe and a wire) on the side of the house to which the cable is connected before it goes inside and then into the TV.
I've been doing some reading about this and suspect I might have a ground loop between the cable grounding and the TV/PC grounding. Does this seem right?
Is so, what can I do about it?
Thanks in advance,
Fred