About 3 days ago the the computer would boot up and run for about a minute and then crash. I thought it might be the power supply so I bought a new one. Still same problem. I thought it might be the motherboard so I replace that. Still the same problem. I am out of ideas. It does it in safe mode too. It just completely powers off.
At the rate you are going you will have a new computer in no time. It would help to list all of your components. If you have more than one stick of ram , try taking all the ram sticks out except one and put that one in the first slot and try booting. Other than that I will wait for your list.