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PC won't boot.....when 4-pin CPU cord is attached.

post #1 of 53
Thread Starter 
Alrighty. I had my no issues last week until Thursday. Got my new GTX 570. I also got a new PSU. Switched the PSU out and put the new one in as well as the video card. Wouldn't boot.

So I put my old PSU in, and wouldn't boot. Figured I messed my mobo up.

So I order a new mobo (ASRock, nice one). I figure I'll RMA my "messed up mobo". So I put my new mobo in my case tonight, put the corsair PSU in. Won't boot, again......

So I troubleshoot. Motherboard is grounded properly. One stick of ram (changed multiple times), one HDD, nothing else. The LED fans light up for a split second and nada.

So I unplug the 4-pin cord that that connects to the CPU area of the mobo (juices the CPU). PC turns on (nothing on screen naturally). Everything turns on, but doesn't boot.

I turn my PC off, plug back the 4-pin in again and it won't boot. Now I'm unsure what is up. I checked all my connections, checked the mobo again. I'm wondering if somehow I fried my CPU and it just won't boot.

Does anyone have any idea what's up? I'm probably going to once again, reseat my mobo tomorrow, but I'm just flustered.
    
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post #2 of 53
you sure you dont have to use 8pin to power up your cpu?
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post #3 of 53
Quote:
Originally Posted by 2slick4u;15182858 
you sure you dont have to use 8pin to power up your cpu?

This^

Also are the cables plugged into the correct modular ports on the psu?
post #4 of 53
I'll say this again..... USE THE 8 PIN CPU CONNECTOR!!!tongue.gif
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post #5 of 53
Thread Starter 
Two black wires, two yellow wires. Wouldn't explain why my PC was working fine for months, then suddenly wouldn't boot. I mean, I put all my old hardware back in (GTX 560 + OCZ 500w PSU) and it wouldn't work like before.

Maybe I meant to write 8pin?
    
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post #6 of 53
Thread Starter 
My bad guys, I meant 8-pin. When the 8-pin connector is hooked up, it won't turn on at all. The LED fans spin for a split second and nada.

When I unplug the 8-pin connector, it turns on (but obviously won't boot). Sorry I wasn't more clear.
    
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post #7 of 53
You sure you have the 8pin in correctly? push the cord in more.
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post #8 of 53
Thread Starter 
Quote:
Originally Posted by nbmjhk6;15182939 
You sure you have the 8pin in correctly? push the cord in more.

It's in how you would say......balls deep. It's the ASRock P67 EXTREME4 GEN3. I'm rather confused.

If everything is connected, grounded. Then my old hardware should have worked when I hooked up my prior PSU and GFX card.
Edited by Calipso - 10/4/11 at 8:33pm
    
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post #9 of 53
Quote:
Originally Posted by Calipso;15182950 
It's in how you would say......balls deep.

Faulty Ram, CPU dead? Hard drive broken? Keep trying different things. Tryi putting ram in different slot.
post #10 of 53
Thread Starter 
Quote:
Originally Posted by Socks keep you warm;15182980 
Faulty Ram, CPU dead? Hard drive broken? Keep trying different things. Tryi putting ram in different slot.

I was thinking my CPU is dead, but I didn't mess with voltage or overclock over 4.0GHz.

If I keep the CPU power cord unplugged, everything turns on. (Hard drives, fans, etc). If it's plugged in, nada.
    
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