Pinging sound will not stop!
I have checked every single setting in sound in system preferences, restarted my computer after clearing all browsers of cookies, cache, history, etc. I have disconnected from the internet, still doing it. This happened once before, I think when I used Chrome. And I did use Chrome again right before it started, but it is closed and as I said, I cleaned it out! I have run disk utility and tech tool deluxe, still doing it. Those two things worked last time it was doing this, but I do not know the exact thing that I didi that made it stop.
After I send this, I will try shutting it down and start holding the x key - does that sound like something that might help?
iMac 2.4 GHz Intel Core 2 Duo, Mac OS X (10.5.8)