Hi, Pentium 2.8 160 gig hard drive pcchips mohter board Home built plus 450 watt power supply. I just tried to upgrade to a new 3.0 d830 processor. Messed around with the bios settings only because the system would not stay powered up. I pulled the new proc and sent it back to tiger. Not sure that this was the problem now. Because the same issue is happening when I tried to reinstall my pent 2.8. Unit powers on for a brief moment goes through part of boot cycle but then shuts down. Give it a rest for a few hours and I can get it to stay on for about 45 seconds. Still hardly long enough to make the changes if any to the bios. I have jumpered a pin that is supposed to reset the cmos. Not sure if this is effective still shuts down after 10 to 20 seconds. Do you think I fried the mobo with a bad processor. Or do I need to update my bios. And if so is my system going to stay on long enough to absorb the changes. Any help would be greatly appreciated.