Xenarc direct cause of audio noise- help!
Hey all, recently the powerbook part of my carputer setup burned out (DOH!) and I removed it from the car until a time when I can have it fixed. Unfortunetly, since that time, the car audio's aux channel has been giving me noise and I haven't been able to figure out why until now.
In a simplified setup, I have an SNES connected to my head unit straight in- RCA white and red to the head unit's white and red. the SNES is connected to the xenarc through the xenarc's aux 1 input; the yellow RCA. Turning it on without the xenarc connected to power or the 15 pin connector cable is fine (small small small buzz in the audio channel; but I'll deal with that later.)
If I connect power to the xenarc, everything is fine. The momment I put the heavy duty pin connector in tho, a loud buzz fills my audio system (#@&(*@&#(*&#@). Remove power or connector, buzz disappears, add power, buzz still gone, add connector, buzz returns.
At this point, I should note that the picture ont he xenarc is crystal clear.
I tried connecting all the available RCAs to sources- no change in the buzz. I connected the USB to a hub- no change.... I connected the VGA cord to a dock (that had no computer attached), no change. I powered the dock on (still no CPU attached). Noise got LOUDER.
So now I'm thinking it's the VGA's fault- when it's not connected to a VGA output that has signal going through it- it buzzes- wtf? Anyone else run into this problem? How is the signal even getting to my head unit too?
Have tried connecting xenarc and SNES to house power- on connecting xenarc the buzz changed frequency a little bit; and seemed to come in on peak bursts in soud more, but other than that no change.
Anyone have suggestions? I'm going to go try a few more things...
ok, back from some more work.
New hypothesis: !??!
It's not the VGA screen- because when I disconnect the video signal from the SNES; all is clear. I'm going to go get some massive monster cable video connectors, and see if they help.