Did you not have something else fail hardware related just last year Kate B? I seem to remember something to do with the graphics cards. If so you have been extremely unfortunate. To be honest I can't remember the last time any bit of hardware failed me. Fingers crossed. Its not as if its an old PC either.
sorry to hear that kate, thats why i dont like leaving mine alone, especially as everything but my mobo has been installed by yours trully! was it underload or did you have a power surge or did it just pop? adam