XP Problem

[jsama]

Ok, built my own PC a little while back, it's been running problem free for awhile, but recently I've been getting a strange error..I'll come back from leaving the computer sitting for a little while (30minutes-hour) and the monitor has been cut off by energy saver, but when I wake the screen the windows shutdown screen is up. (Standby, Restart, Shutdown or Cancel) I naturally hit cancel, and the screen instantly pops up again. The only thing I can do is restart or shutdown to fix it. If I select standby, when I come back, the screen is still there. I turned off the energy saver monitor sleep, and so far it has stopped the problem, I was just wondering if anyone has any idea what this is? It has happened three times in the last two days and I use XP Home Eddition. Intel D865PERL Board, Maxtor HD, GForceFX5600, Intel 2.4b P4, Samsung CDR, Logitech Dual Optical mouse, Generic Comp. USA Keyboard. Any help would be greatly appreciated.

jsama

[newme]

i never use sleep mode anymore causes to many problems,i just use a screensaver now,i had a power supply burn out using sleep mode.