I’m at my wits end with this computer. It’s now got a brand new motherboard, but still doing the same thing, i.e., powers off after a few seconds.I have checked all the hardware by using another computer and everything works fine, to include changing out the power pack as well as the memory. I did discover that if I remove the memory from the MB it doesn’t shut down until you manually shut it down. I discovered this with the old MB so I thought that the MB was bad and replaced it. Could the CPU be bad? I really hate to replace it only to discover that I have the same problem. Any help/suggestions will be appreciated. Thanks – Jim