|HP Pavillion Desktop-2.6 celeron-40g hdd Purchased 12-09-03|
As stated above system will shut off before the XP logo appears on the monitor. If started in safe mode it does the same, shutting down before getting to safe mode. If you choose F1 on startup and put it into setup mode it will stay on until you choose to turn it off. Also noticed that when it shuts down prematurely the two internal fans stop but the power supply and its fan stay on.(Don't know if this is normal or not.