This problem seemed a little unique to search for, so I could not find any threads with my specific problem, so heres what happened.
I have a DFI NFII 400-AL ATX nForce2 Athlon Motherboard with a Athalon 2200 processor. I did not know much about swapping CPUs, so i did not install or look for updated BIOS. I swapped the 2200 with a Athlon XP3000 processor, witch is supported by my motherboard. When I powered it on, it ran for 1 sec and shutdown with no Beeping noises. Then it wont allow you to turn the PC back on until you pull the power plug for a few seconds and reinsert it. I gave up on the 3000XP CPU and reinserted the 2200 CPU. When I try to power on it will randomly shutdown on its own before windows boots up. And it will again not allow you to power it back on unless i take out and reinsert the power cable. I know it has something to do with the CPU swap I so foolishly tried, because the problem started right after i did the swap. Also I try to get into CMOS settings to check things out, but the PC shuts down before I can take a look. Also there are 2 red lights visible on the motherboard if that helps. Also sometimes before it shuts down it goes through the list of processes and it does detect CPU temperature and detects the 2200 processor. I would like to still install the XP3000 processor but if I cant I don't mind, I just want my PC back up and running again :)
I would suggest you switch the power off the pc.Go in to your tower ensure there is no power running through your motherboard make sure you completely remove the power lead from your psu.Then look for the CMOS battery which looks like a watch battery remove the battery wait around 10 to 15 secs place the battery back in this will set your bios to default.Then download and install the latest bios for your motherboard and then re install the new CPU.When replacing the CPU check the pins on the CPU to ensure there is no damage to them if there is do not attach to you motherboard.Do not try to force the CPU in this should just sit quite quite comfortable in the socket without any force if it does not then one of the pins must be damaged which could be the reason it keeps switching off.
thank you for the reply =). I will try this method out when I get a chance. I posted the same response on other forums. Everyone seemed to think all i needed was to add thermal paste. But that just didnt seeme to add up. Thanks again.
Did you do it using the same heatsink? Once you've removed a heatsink from a processor, you need to remove the current thermal compound and put on new stuff, or the heat transfer won't work, and the CPU will overheat. it is that overheat that is probably shutting the PC down, especially in the second instance. As for the first instance, yes, CPUs can get that hot that quickly without a heatsink.
I just dont see how the thermal paste could be the problem. If the PC has been off for a few days and I try to turn it on with the cpu in place and heat sink. Why would it immediately shut off within a matter of 4 seconds? I dont think a CPU can over heat that quickly =S. Anyway I have not gotten around to doing what John179 has suggested. I just want to see if I can get my computer back to the Desktop before I add Thermal paste. I dont want to have to add it if the PC is still not booting up correctly =/
Actually it can. An athlon XP 3000+ I had shut down in well under 1 second with the heatsink not attached properly. Not having thermal paste usually introduces a delay, but it's only a matter of seconds, in your case 4.
Think about it, a CPU produces more than 5 times more heat energy per square inch than an electric iron, and you don't need me to tell you how hot those things get. You have 100W of heat in an area not much bigger than a thumbnail, the equivalent of an electric oven in an area the size of an A5 sheet of paper.
Suit yourself, but I never change or even take off my heatsink temporarily without re-applying thermal paste.
