The internal modem on my pmg4 agp suddenly quit making sounds. It works fine, but no sound. I don't really miss the sound, but it seems like an odd quirk, and I'm concerned it might be an indication of some problem lurking behind the scenes. The modem control panel still shows the sound being on, and I tried switching it on and off to no avail. I also trashed the modem preferences, and restared the modem to create a new preference file. I ran a complete diagnostic on the modem using Tech Tool Pro 2, it checked out fine. Any suggestions?