All, I built a new PC recently, based on an Asus A7V8X. I finally connected my PC to my receiver (H/K 520, not that I think it matters) and got that working. The sound is fine, no hum, no distortion like I had when I hooked it up using an analog cable, but now something odd is going on with the PC. The monitor has a weird flicker to it, almost like when you're in an office under fluorescent lights and have the refresh rate at 60hz or something. I'm guessing this might be a ground loop problem? I have a Radio Shack ground loop isolator that I was using when it was hooked up via analog, will that work with a digital signal also? I'd just try it out, but I need a female->female RCA converter to do so. Hope this made sense... anyone got any ideas? Thanks, -Brett.