shutdown problem

I recently bought a Abit KG7 Mobo with a Athlon XP 1900 1.6GHZ CPU both retail, the CPU has a running temp of about 135 F. I am running Windows ME with Micron Memory 2 @ 256MB DDR 2100, I have a 420 watt turboline switching power supply. I am having a problem with the shutdowns intermittently. If I leave the PC on all night the system appears to go into some kind of hibernation mode or just plan locks up and the monitor goes blank, the keyboard locks, the power button and the reset buttons do not work. I have to kill the power at the power supply to get the system back. Occasionally when shutting down windows instead of powering off, the system restarts itself. I have turned off power management in windows and looked in the BIOS (which is the latest (4-02-02 761-686B-6A6S6A1AC-68.) to see if there is a setting to stop the system from powering off after shutting down windows. I could not find a setting. I have troubleshot this problem to death with no success. I was hoping someone might have an idea about a solution to this problem? I realize that this could be bad mem or power or Mobo or CPU but was hoping someone might have ran into the same problem.
Any help would be greatly appreciated.



<P ID="edit"><FONT SIZE=-1><EM>Edited by ufowatcher on 04/30/02 00:00 AM.</EM></FONT></P>

Thanks for the tips, I took cooling into consideration when I built the PC about a week ago, I have 2 case fans one sucking air in and one blowing out, the power supply also draws air out of the system, the CPU was retail and came with the fan and heat sync from AMD, but I do agree that the temps are about 10f to high. I might try a dual boot with XP and see if it does it with XP running.

thanks again

<A HREF="http://www.viahardware.com/faq/kg7kr7/kg7kr7faq.htm" target="_new"><b>Here</b></A> is a good site for you MB and maybe you can find your answer.


<b><font color=blue> I took an I.Q. test today...It came back negative.</font color=blue></b>