Hello all,
Thanks in advance for help. I've searched around the forums and have found nothing quite describing the same issue that I am having with my Promedia 4.1 system, so here goes:
PROBLEM:
With or without my promedia 4.1 system powered on, and with or without it being connected to an audio source, the front right speaker makes a loud hissing/white-noise-like sound, much like static on the radio.
DIAGNOSIS/TROUBLESHOOTING:
I was informed by Sysbema's audio repair that this sounds like a grounding issue with the speaker, so I tried another of the 4 speakers in place of the current front right speaker, and the problem peristed. I have found that plugging the black/ground/(-) wire of the front right speaker into the (-) jack on the subwoofer for the front left, rear left, or rear right resolves the issue and the speaker works perfectly. I infer from this that I have a grounding issue in the subwoofer related to the front-right (-) jack. I pulled the sub apart and visually inspected the circuitry (of which I am by no means an expert) but I didn't see any burning, disconnected wires, or solder points that had come loose in following the circuit from the FR(-) jack back as far as I could.
Any ideas? Possibly a capacitor that ahs gone bad? (I read this was common for the 5.1 system). Could I use a multimeter to check the circuit? Though, if I understand how capacitors work, I shouldn't see a close circuit through the capacitor unless it has fully charged, correct? Any help or suggestions would be great, because I do not have the money to send this thing in for repair, but I have a degree in physics so I should theoretically be able to figure this out, one would think. (that's a bad pun, because my degree is theoretical physics, not applied).
Again, thanks in advance!