![]() ![]() Some of the most notorious effects of ground loops are the noise and interference that can become present in audio, video, and radio transmission systems. They can also create an electric shock hazard, since ostensibly "grounded" parts of the equipment, which are often accessible to users, are not at ground potential." "In an electrical system, a ground loop usually refers to a current, almost always unwanted, in a conductor connecting two points that are supposed to be at the same potential, often ground, but are actually at different potentials. *boom* goes the cable box, receiver, tv, poor cable installer guy who got zapped, etc. Long-term, the current flowing through anything connected to the two systems probably isnt going to be super healthy for them.Ī friend of mine, a good number of years back, blew up lots of equipment until they diagnosed that his whole house mis-wired, was trying to dump a lot of power into ground, and wasn't grounded. (Google pictures of coax splitters and you'll find lots that have a ground screw on em.) More commonly these days, in residential settings I've seen a grounding wire run to a water pipe in the basement. On the cable tv side, they used to drive a rod into the ground and attach it at the point of entry. ![]() The differences in the level of "ground" causes the hum. either in the cable system, or in your home's electrical system. Hsawtelle, not to scare you, but your symptoms are likely caused by improper grounding. (unfortunately, full insertion of the two-conductor plug leads to buzzing, so that is not a permanent solution). However, there is NO position or amount of manipulation of the Tivo-branded three-conductor plug that gives clean audio. Here's another random factoid: in the course of troubleshooting, I tried plugging in a two-conductor (earphones) miniplug into the A/V Breakout jack, and there are positions of that plug (partial insertion) that yield clean mono or stereo sound with no buzzing. Maybe something is shorted out internally. If that doesn't work I guess I will return the mini for a replacement. I do have another cable set because I accidentally bought two I will try the other cable. I know it's not the A/V receiver because it plays other sources fine through that input. I'm getting stereo sound, but with a loud background buzz. I will try swapping the wires around but since I'm using the Tivo brand wires and taking red -> red and white -> white it seems like that should have worked. ![]() The component video is working fine for me, but I am getting the horrible buzz from the A/V plug. My understanding was your buzz was coming from the A/V plug (breaks out to left, right, and composite video), not the component video plug. If I understand you correctly, you're saying that the horrid buzz you experienced was fixed by experimentally swapping where the plugs of the breakout cables were plugged into your TV until you found a configuration that worked? ![]()
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