I have an HP desktop PC Pavilion d4650y with XP OS that started rebooting itself. Finally it went dark altogether. On restart it began the "bios beep" 2 short and 1 long. After searching forums and HP, it direcxted me to a video problem, so on the direction of everyone that seems to know, I unplugged everything 1 at a time and restarted with the same condition, 2 short and 1 long and no bootup. I took a chance and replaced the video card and no change other than the CPU light on the front case acts as though ther is much CPU activity other than video. I checked trhe monitor on another pc and it works fine. Is the CPU/ motherboard the problem or have I missed something ? Thanks, Mark