HELP - A8N-SLI Assembly Problems

[leverda]

I had a computer custom-built for me about 10 months ago, including (I think these are the only relevant parts) an Asus A8N-SLI Deluxe motherboard, a Lian Li PC-V2000 case, and an Enermax EG651P-VE (FMA) power supply that was taken from an older Intel computer that I had built myself and used for about two years. Went away for Xmas vacation and when I returned this week turned my computer on and the chipset fan on the Asus motherboard was dead. I got a Swiftech MCX159-CU chipset heatsink and fan to replace it, took the whole computer apart last night, put the Swiftech on, and thought I had otherwise reassembled everything precisely as it had been. But when I tried to turn the computer on, nothing happened when I pressed the power switch on the case. Silence. Then I noticed that all the case fans, and CPU and heatsink fans were running even though the computer not powered up. Thought problem might be case switch (maybe it is?), so I pulled out all the system panel connectors (HDD LED, Power SW, Speaker, Power LED), plugged power supply back in, and all fans still came on. Same result when I unplugged the 4pin EZPlug connector from the motherboard. I did notice when I plugged the main ATX power connector into the motherboard that there are four more holes on the motherboard socket than there are plugs in this connector, and am wondering if I put that in the wrong place (I centered it in the connector, two holes showing on each side). I have plugged in the square 4pin ATX connector. Any idea what I'm doing wrong? Misconnected power supply (should all the fans be running when the case power switch is not even connected, no less turned on)? Bad case switch? Other? Any help would be appreciated . Thanks.

 

[theMan]

is the power supply 24 pin?

 

[leverda]

Yes, I'm fairly certain it's 24 pin, it fit (no extra holes) in my old Intel (P4C-800 Deluxe) motherboard, sorry, I'm an old geezer and it's hard to count so many small pins, but from looking at power supply manual does look like it's 24-pin. I plugged it in so the little clip on the power supply lined up with the little bump on the inner side of the socket so that it would lock in place, if that's of any relevance.

 

[TheRyuu]

@theman
If you read the entire OP then you would have noticed that it says that "he centered the plug showing two holes on each side". Now I'm fairly certain that thats the wrong way to plug in a 20pin PSU into a 24 pin socket, but it does confirm that his PSU is only 20 pin.

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Count the pins, it's the easyest and sure way.

You say you "centered the connecter", i'm wondering how you did this. Isn't there some sort of safety pin that doesn't let you plug it in wrong??? And BTW, there should be four pins on one side (as in you put the ATX power connector all the way to one side). I don't know if you fryed your mobo by doing it, I also THINK that the ATX power connector should be all the way to one side.

By you saying that there are two holes on each side that confirms that it's a 20 pin PSU, no biggy there just that there will be 4 extra pins ON ONE SIDE) (and please don't plug in the 4pin 12v connector in those 4 pins).

 

[leverda]

Okay, I overcame my laziness and pulled the power connector out. It DOES have 20 pins, not 24. The last post indicates that it should be plugged in all to one side. My question is, with the floppy and IDE sockets on the bottom, and the power connector just above them, should the four empty holes be on the left or one the right? Thanks for any information. (And I hope I didn't already fry it)