My fiancee computer has been shutting down randomly and it has been becoming progressivly worse of late. So being the genius that I am, I opened her desktop up and took a look around. Lo and behold, the cpu cooler was clogged up with massive amounts of dust. So I pulled it off, and installed an upgraded cooler that I had received with a new processor I had purchased for my own rig. I unhooked everything pulled off the old cooler assembly and installed the upgraded one according to instructions. Put it all back together and now it will not complete a power up.
The computer starts the power up sequence like normal gets to just past the bios flash, we see the windows symbol come up for about 1 second then the computer powers back down immediately. I have gone through and checked all the connections checked the power switch plug to make sure it is right. Still no change to the power up failure.
OS windows 10
MB Biostar A85W
CPU aMD A6 don't remember more than that for details