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[TheEnglishJob]

So I got my 650W Corsair power supply in the mail the other day and I want to send in the MRI. However, I wanted to make sure it worked before I did this and unfortunately I won't be ordering the rest of my computer until later this week. So I just used an old desktop (HP) and plugged everything into it to make sure it worked...I pressed power and nothing happened.

In further inspecting, I realized the 24 pin plugs were slightly different. On my old PSU the "blank hole", the one with no metal prong inside, is on the bottom row 5 slots from the right. On my new PSU it is on the top row 5 slots from the right. Does this make a difference? The motherboard has metal prongs on all 24 pins so I figured it shouldnt matter but I wasn't sure.

Also, is it okay for me to, lets say attach the 4 pin plug of one psu to the motherboard and the 24 pin of the other psu to the motherboard and vice versa to find what the culprit is?

Thanks for you help in advance.

 

[TheEnglishJob]

Okay, I plugged everything except my hard drive into the old power supply and hard drive to my new power supply and the computer started right up and said the hard drive was not connected (not getting power). Do I have a defective power supply or am I missing something obvious here (like some hidden switch I have to press or something). I was under the impression it was a kind of thing where you plug it in and its good to go. And yes....I did actually turn the power supply on...I even tried turning it off and seeing if that worked in case they wired it backwards. I think its defective, but let me know you guys think.

 

[Dangman]

Try the Paper clip trick to start up the PSU:
http://www.overclock.net/faqs/96712-how-jump-start-power-supply-psu.html

 

[TheEnglishJob]

I just tired that actually as I was reading through the corsair problem shooting guide. The fan actually turned on, however it was moving very very slowly. I don't know if it wasn't hot or if it is just nice and quiet. However...I plug it into my computer and nothing happens

 

[Dangman]

I just tired that actually as I was reading through the corsair problem shooting guide. The fan actually turned on, however it was moving very very slowly. I don't know if it wasn't hot or if it is just nice and quiet. However...I plug it into my computer and nothing happens

The PSU is nice and quiet. There might be an incompatibility between your PSU and that old PC.

Oh did you remember to plug in the P4 or 4Pin CPU connector?

 

[TheEnglishJob]

Ok here is everything I tried. BTW...I determined it was running fine using the paper clip trick and am excited when I get a PSU that can work.

1) Plugged everything in to new psu and nothing turned on
2) Plugged everything except my harddrive into old PSU and my harddrive into new PSU....computer turned on but said harddrive was not connected
3) Paper clip trick...fan turned on
4) Tried steps 1 and 2 over again making sure everything was connected properly and same result

Is it dead or is there something that makes this PSU not talk to my old computer?

 

[TheEnglishJob]

Oh did you remember to plug in the P4 or 4Pin CPU connector?

Yep...remembered it and checked it twice when I tried plugging everything into new PSU

 

[TheEnglishJob]

Okay...upon further research I have found that HP/Compaq systems only run on specified power supplies. So that takes care of the fact that it wouldn't boot when everything was plugged into it. However, does that take into account the fact that the hard drive would not boot when it was plugged into the new PSU and everything else into the old PSU?

 

[Zero82z]

However, does that take into account the fact that the hard drive would not boot when it was plugged into the new PSU and everything else into the old PSU?

Probably not. However, given that the PC works fine without the HD connected to the PSU, I'd be more inclined to believe that the issue is with the drive itself and not the power supply.