Re: PC turns off after few seconds after on button
had this happen to me a week ago. coincidentally after i put the profile on for the memory on my gigabyte mobo to run it at 1600mhz.
powered on and it would shut down then turn on ect ect until i did the off button on the psu.
tried everything such as resettign the bios, taking the battery off the board, bought new ram.
ended up being the 3 year old Be Quiet Dark power 1000w PSU was at fault (put me right off that brand now)
runs great again with the new OCZ Fatality 750w PSU i replaced with