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ASUS P5AD2 Won't Power Up

I

imported_lfisher82

Junior Member
I just recently tried to build a new box with the following main components:

Intel P4 3.4 (550) LGA775 HT
ASUS P5AD2 Premium Mobo
512MB x2 Crucial Ballistix PC-5300
Enermax 460W PSU (20 pin)

The problem I have encountered seems to be one that is commonly occuring with a setup similar to my own. When I connect the power cord to the PSU and turn the PSU switch to ON, the green mobo led comes on as it should. However, upon pushing the power button, the fans just spin for about a second and then the system powers off. Then, I can remove the power from the PSU, repower on the PSU, and then repeat the same procedure. I have googled and read everything I can find related to this, but none of the solutions have worked for me. There are a few things I'd like to point out. First I have 20 pin PSU when the board is actually 24 pin. I did read somewhere that this should not be a problem as long as the ATX power plug is connected as far right as possible (as that is the only way it fits). I have connected the 4 pin power connector next the CPU. I have tried moving the memory around in all sorts of different configurations. I have my speakers connected the onboard audio and cannot even get a post message.

Do any of you have any ideas as to what I should do next? I don't really have any other components to test with unfortunately and neither does anyone I know. Is there any more information that I can provide that could help any of you accurately determine my problem. Any help/ideas would greatly be appreciated. 🙂
 
Yes, I used the standoffs. This is about the 7th computer I've built, and I've never had this problem before. So I'm kind of at loss about what to do next.
 
Thanks Uncle Bob. I though about your post a little longer and realized something that could have caused my problem. When I was mounting my motherboard yesterday, a buddy of mine was helping me place the standoffs. Your comment made me remember that the standoff for the upper left-hand corner was misplaced. I then realized that this was probably shorting out the mobo. So I decided to try to the mobo to boot on a piece of cardboard since it's no conductive. That worked so I moved the misplaced standoff to the proper location and then made all the necessary connections. I hit the power the button and wah lah! The computer posted. So all this trouble was caused by a misplaced standoff. Thanks again Uncle Bob! You helped me solve my computer quandry! 😀
 
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