New PC will not power on

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meanbunny

meanbunny

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Oct 23, 2013
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Motherboard: Biostar Hi-Fi A85S3 Ver. 6.1 FM2 Socket
CPU: AMD Athlon x4 750k
GPU: Sapphire AMD Radeon R9 270
PSU: Antec 450 watt
Memory: Corsair Vengeance 1600 Mhz DDR3 Ram 2 x 4 GB Dual Channel
HDD: Western Digital 1 TB

My friend and I have just hooked up this PC and and the PC will not power on. We hooked up the power switch to the headers in the bottom right corner of the MB, we even tried shorting them with a screw driver and nothing, it just won't power on. We checked to make sure the PSU was plugged into the MB correctly. One thing I found weird is that the PSU doesn't have a 24 pin connector it has a 20 + 4 pin connector, I don't know if that is unusual or not but it still fills all 24 pin slots. What could we be doing wrong? I appreciate any help in advance. Thank you.

Edit: It is not the PSU, we just took the PSU out of a working computer.
 
Solution
A
You could possibly have gotten a bad processor, do you have a speaker connected if so are you getting any beeps upon power on(or attempted power on).

Do any fans come on when the power button is pressed?

Also have you attempted to unseat and reseat the ram this is a common issue with first time builders they do not apply enough pressure to the ram to seat it fully.

Besides these things the most likely problem is CPU, Either A: a DOA processor, or B: a processor that was accidentally mishandled damaging pins(breaking them off or bending them.)

Let us know if we can be of further assistance.
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cprguy

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Jul 24, 2014
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Did you just install the motherboard? Is it on the proper risers and not shorting out underneath?

Also some motherboards have a jumper that resets the cmos and a lot of motherboards will not turn on if the jumper is set on those pins.
 
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meanbunny

meanbunny

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Oct 23, 2013
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What do you mean by risers? We put the motherboard in and screwed it in the correct holes. Going to test taking the jumper off the CMOS reset header right now.

Also yes, that is one of the first things I made sure that the PSU was on.

EDIT: Removing or moving the CMOS Jumper did not change anything.


 
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meanbunny

meanbunny

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Oct 23, 2013
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This Motherboard got outstanding reviews on newegg. I find it hard to believe that this MOBO came DOA. Although that is always a possibility. First time for everything. I have been helping my friend build this over Skype so me being the computer whiz, I cannot tangibly look into any of these problems. All I can do is give him instructions and hope for the best. I am going to have him hire a freelance computer tech off of Craig's list to come over and give a diagnosis and see if he is just making a simple mistake or if the motherboard is indeed DOA. He is just going to assemble his old PC and use the PSU from the one we just built. Thanks for the help guys. I will check back here incase anyone has any other ideas.
 
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meanbunny

meanbunny

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Oct 23, 2013
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Well, since my last post my friend has replaced the motherboard with the ASUS F2A85-M PRO FM2 AMD A85X motherboard and an EVGA 750 Watt Gold Certified PSU. This time there is a greenlight on the motherboard, but still a no go on powering on. What in the world could my friend be doing wrong? We now have all brand new parts and replaced the motherboard and PSU once each now. Is there something wrong with the wiring from the on/off switch from the case to the motherboard? My friend even tried touching a screw driver to the pins it said to touch and it still won't turn on. The Case he has is the Cooler Master Elite 430 - Mid Tower.

If anyone has any idea what we are doing wrong, please let me know. Thanks guys.
 
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angelice

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Mar 22, 2013
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10,860
You could possibly have gotten a bad processor, do you have a speaker connected if so are you getting any beeps upon power on(or attempted power on).

Do any fans come on when the power button is pressed?

Also have you attempted to unseat and reseat the ram this is a common issue with first time builders they do not apply enough pressure to the ram to seat it fully.

Besides these things the most likely problem is CPU, Either A: a DOA processor, or B: a processor that was accidentally mishandled damaging pins(breaking them off or bending them.)

Let us know if we can be of further assistance.
 
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