Computer turned off

[lor1963]

The computer was running great then it shut down and would not start. Through process of elimination I found that if the 4prong power plug was NOT plugged in it would start.

 

[WR2]

That 4 pin power plug was the one near the CPU?

 

[WR2]

 

[WR2]

What are you using for a power supply? List make and model.