Studio 840 PSU

I'm having a issue with my studio 840 powering up. I jumped the green and black wires, both the fans and hard drive powered up. I also checked the voltages with a dvom and all the voltages were correct. i'm thinkning the m/b is ng but am still doubtful about the psu. i do have an old psu from a dimension 8100 psu, could i plug in that psu to see if it powers up my studio 840. if the 8100 psu powers up the studio than i would buy a new one for the 840.
 
You just solved your own issue, lol. Could very well be a psu issue. Try what you suggested then get back to us on the forums.
 
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