Computer Turning OFF on its own.

My computer is turning off all by itself. I have changed the Power Supply and the CPU Fan, without fixing the issue. I have checked the bios and all the thermal protection monitors have been turned off.


Would it be the motherboard causing the problem???

 

Maybe pull the ram and hard drives. Start er' up and she if she turns off. If not, it might be an OS problem. If not, work you way upwards. Add ram, one stick at a time, turn on, let it run a bit. Then reconnect the hard drives and see what happens.

Just an outside chance, have you tried a different outlet or surge protector? Try a different power cable?

 

I have tried that. I have one piece of RAM on the board, no HDD's. I run Memtest and after 5-10mins unit is off.

I think I will pickup another mobo and start there.