I built a new computer about a month ago, and I noticed that my speakers (which are old and malfunctioning anyway) made a disquieting static noise every time I turned my system on or off. I googled the problem and read something about how if the speakers are making that noise, it might mean that they're corrupt and that they're leaking excess power to the motherboard and may damage it over time. Today, the rear 3.5mm audio port on my case stopped working completely. No sound comes out using either speakers or headphones. The front port works just fine with headphones, and I haven't tried the speakers in that port.
This is probably unrelated, but I'll include this just in case it's relevant: Two days ago, my computer shut off suddenly, possibly due to a spark in the outlet, and wouldn't turn back on until I switched outlets and rebooted, then it detected an error in the HDD and repaired, but got stuck POST-ing over and over for a while before it came back up.
I'm using Windows 7 Pro and an Asus Sabertooth 990FX motherboard with an onboard Realtek ALC892 chipset.
What could be wrong here? Is it possible that what I read is correct, and my damaged speakers killed my sound card? Do you think there is any way to get the rear audio port working? If there isn't, would getting a PCI sound card be a way to get around this?
Update: The problem mysteriously fixed itself. I think Windows might have disabled the rear audio jack and I just didn't know. It's nice to know my sound card isn't damaged!