I have no idea what my problem might be. One minute my computer is working fine (IBM Pentium 4 with Windows XP Media Centre), and the next time I look at it, the monitor is blank with a flashing cursor in the upper left corner. I restarted the computer, saw my video card information, then IBM logo giving me the choices of F1 for setup or F12 to select boot device (or something to that effect) and that's it. No memory listed, no drives listed, none of the normal boot info that flashes on the screen. When I go into setup, everything looks normal. It is recognizing my memory and my drives. I can put in the Windows CD and boot from CD-Rom. But it seems it's not booting from the hard drive? Should mention that it is SATA hard drive, nearly new, about a year and a half old. Any and all suggestions would be greatly appreciated.