Newly built computer will not start

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triple-u

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Jul 4, 2007
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Hi, I'm building a computer for the first time and I'm having a little trouble. I'm not too sure about the connections and cables.
- I'm using a Gigabyte 965p-ds3 mobo and I have a 24 pin cable from the psu plugged into it, along with the ATX 12V connector plugged in.
- I have an optical drive plugged in through an IDE cable and power from the four pin molex
- My CPU core 2 duo is put in and the cpu fan is the one that comes with the retail package.
- I have a video card plugged into the pci-e slot.
- Two ddr2 sticks of ram are in the mobo
- I've connected the power button/reset button pins to their respective spots on the mobo.

The only thing I don't have connected is the hard drive, but i don't think that is the problem.

Now, when I plug in the psu and press the power button, nothing happens. No sounds, beeps, fans running, nothing. I'm guessing that there is something wrong with the cabling that I have. I think something is wrong with the power button pins, but i'm not sure. Also, the PWR_LED pins from the case have a positive and a negative pin, but on the mobo, there are three pins for PWR_LED, one positive and two negative, does this have to do with anything.

For the power supply, nothing happens when I turn it on, but when I flip the switch on the back to turn it off, it makes a high pitch sound for about 1 second then fades away, as if it is turning off. That is why I don't think the psu itself is faulty, maybe the cables.

Does anyone have any suggestions or advice for what I can do, any help would be greatly appreciated. If you need more details, just let me know. Thanks in advance
 
Joined
Jul 19, 2005
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From the front panel (excluding any USB connectors) do you have 4 double kk connectors such as the ones in the attached pic. If so, how are they marked?
 

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Frank4d

Retired Trusted Advisor
Joined
Sep 10, 2006
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9,126
The number one thing to check is make sure standoffs were installed in the case everywhere there is a mounting hole in the motherboard and nowhere else.

As for the PWR_LED and other case connectors, you can start with them all disconnected except the one for the power switch. If you can turn the PC on, worry about them later.
 

triple-u

Thread Starter
Joined
Jul 4, 2007
Messages
5
From the front panel, i have a power switch (2 wires), reset switch(2 wires), +p LED, -p LED, and HDD LED. Almost exactly like the attached pic.

As for standoffs, there is one hole that is not screwed in because there is not hole in the case for that, is that the problem? does it not complete a circuit?

Thanks

edit: The hole is in the middle right of the motherboard
 

triple-u

Thread Starter
Joined
Jul 4, 2007
Messages
5
Ok, I figured it out, the standoffs where the problem, my case was touching parts of the motherboard causing it to short. Thanks to both of u for helping me.

Now I have another question, is there something wrong with my cpu fan? It takes a few seconds after power up to start spinning, then it stops for a few seconds, then it starts again, then just stops. I turned off the computer after 10 seconds of not spinning because i was afraid the cpu would heat up.

edit: nvm, i guess it was just a little 'rusty' from sitting there for a couple of weeks, seems to work fine now
 
Joined
May 12, 2007
Messages
392
your cpu fan is probably being auto controlled by the bios. Look into your bios settings.
 

triple-u

Thread Starter
Joined
Jul 4, 2007
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5
What section of the bios would I look under in the bios. Power management? I can't seem to find anything about the cpu fan.
 
Joined
Aug 12, 2003
Messages
5,605
its in the pc health section..... disable the fan speed control method... and don't worry about the fan not starting for a few sec's when turned on,mine does that too
 
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