No, and I only have one firewire port. The only other hardware I have plugged in is my printer via USB.

I did try disabling the laptop (RealTek) speakers and used the presonus as my sound card (with other speakers connected to the presonus). I tried playing a couple of songs via Media Player and the sound cut out after about 20 seconds. I also tried playing video using flashplayer (while researching the pres. candidates online) and that cut out after just a few seconds.

It would seem that I'm having a hardware issue, but I'm not sure of the source on the inside that's causing the malfunction - sound card, connections, etc. Maybe you have an idea. I am calling Presonus as I type this, but your expertise is valued as well. Thanks!