A friend of mine gave me a MSI K6N Diamond Plus mobo. Everything on it worked, except for the onboard audio, which wasn't a big deal. Recently, I tried to install a Sound Blaster X-Fi sound card, only to have my computer tell me that a recent hardware change is preventing windows from booting up. So, I took the sound card out, but now I am no longer getting any kind of a signal to my video card. The strange thing is that on occasion, it will work. I've tried switching the video card to the other PCIE slot and switching out the RAM, but so far nothing has worked. Any suggestions? Or does it sound like this mobo is fried.