Posted 12 January 2005 - 06:19 PM
Do you have an AGP or PCI video card?
It sounds like a heat related issue based on you having to physically shut it down, wait, then bring it back up. Even though you show normal temps, it may not show you the temp spike before it shuts itself down.
The reason why I ask about the video card is because if you do not have one, then you may be able to take some of the "pressure" off the CPU by deligating tasks to a dedicated card.
It could be a power issue as well, but those as usually related to having a computer that does not come on at all, or when to turns off after a specific time.
Another thing you could look at is the fans. If you can turn off all outside noise as possible, and listen to right before it shuts off, see if you hear the fans powering down. Even for a moment, the computer may turn those off first, in the process of turning all of it off.
Another item that may help out would be the motherboard name. If you are not sure of what it is, then a make/model number of the computer would be helpful. Also, if you have added any hardware recently, it would be helpful to mention it.
We are all curious like a cat. We wonder, we ask, we learn.
Please post back when a suggestion works, so that others may learn.