March 16, 2011 10:13 AM Subscribe
Please help us eliminate an unwanted noise from our home theater.
posted by simbiotic to technology (7 answers total)
Apologies in advance for not knowing the technical jargon to effectively communicate my question here.
We have our DVR, PS2 & 3, Wii and PC going through an A/V switch. The audio output goes to a "home theater" receiver with 5 speakers. Some input cables might be HDMI or some-HD-thing I don't know and some are the yellow, red and white guys. Previously, we moved the video output between a projector and an lcd tv. This involved physically unplugging and plugging the output, not an electronic switch.
Everything works great until we plug the output from the switch to the projector, then we get an unbearable humming/buzzing noise.
We've tried different configurations of cords, new cords, a new switch -- the problem is definitely the projector itself but when we go to the projector directly from any of our devices rather than through the switch, we don't get the same noise. The noise only exists when the video output goes to the projector from the switch. The noise exists when the projector is not in use, for example, if we're listening to music from the PC through the switch with audio output to the receiver and the video output going to the projector with the power off. The projector is about 5 years old and the noise only started recently.
Is there some sort of filter or adapter we can use to prevent the noise? And did we cause this by abusing the jacks in some way? (Are these things even still called jacks?)