Getting Static Sounds

Hi, I just hooked up a 5.1 audio system (Polk Monitor 50's fronts, CS1 center, Yamaha Subwoofer, Sherwood RD-8504 receiver) to go with my 42" LG LCD HDTV, and the TV is interefering with the audio somehow.

When the TV is off, the static mostly goes away, when the TV is unplugged the static is gone, and hooking up an antenna to get TV signal makes things worse. The Blu Ray player also seems to introduce a little static (hardly audible) when turned on and none when unplugged. Also, turning on/off the Blu Ray player or unplugging it gives you a short pause in audio. At first when I was watching a DVD I thought it was a hum/buzz sound, but when reproducing the sound by unplugging/plugging in the TV with FM radio on, it was clearly static. And the noise is worse when you first turn on the audio, but gradually lessens over 30/45 minutes where you can only hear it up close to the speakers.

I'm not sure if this is an EFI issue or grounding issue. I'm renting an older house that recently had it's electrical redone, but I think it's only 110 volt power (instead of 220) and I didn't see any grounding rod by where the breaker circuit box enters the building, but it mght be grounded elsewhere. The power cords for the receiver and blu play players doesn't have grounding plugs (3rd plug), but the TV does. The TV antenna also makes a big difference when plugged in or unplugged though.

I had all the TV/Blu Ray/audio system cords on a power strip in one outlet, but then ran an extension cord from another outlet for just the audio system to try and fix the problem. The static didn't go away, but the audio got a little louder. The outlets for the TV and audio components are on the same breaker though. Would it make a difference if it was on another breaker? I turned on the electrical stove, microwave, and dryer at the same time (all on different breakers as the TV/audio) as the audio to see if that would introduce static and it didn't. I'm working on tidying up the cables so they aren't so intermixed, but isolating the TV power cord and running it away from the speaker cables didn't make a difference. Does anybody else have any suggestions?

Thank you. The noise when playing the DVD started out as a loud buzz (you couldn't hear anything but buzz) and slowly became a barely audible hum over a period of about 30-45 minutes. I was thinking maybe it was just the speakers or receiver breaking in though because by the end of the movie there was no noise and it was the first time I played them.

The noise when on FM stereo was clearly static, but I'm starting to think it was EMI interferance with the FM signal around the FM antenna. DVD was upconverted to digital, FM is obviously analog.

Another odd thing is that the center speaker was playing with absolutely clarity in both cases. The noise mostly came from the Monitor 50 tower speakers (which are bi-wired), but a little noise also came from the surround speakers and subwoofer. The noise when playing DVD was differently pitched for each set of speakers.

When doing auto setup with the mic, the receiver says there is an error and the front speakers aren't connected (even though it plays music and plays it clear when nothing else is plugged in). They should be wired correctly, before playing for the first time I removed those clips that connected the posts because I read it can cause problems if not removed when biwiring. thatThe surrounds are some old AIWA 3-way bookshelf speakers I got 10 years ago (before Sony bought AIWA out) that were considered decently high quality back then. The AIWA speakers are 6 ohm while the rest are 8 ohm but I dismissed that as causing the problem.

I popped in a blu ray video and had zero noise. Then popped in another and same issue. I think the speakers were just breaking in and the static was radio interference. The speakers are working fine now, but I still can't get that darned auto setup on the receiver to work though. The microphone doesn't seem to be working.