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Discussion Starter · #1 ·
So awhile back my friend built a new computer (specs below). The computer worked fine for about 1-2 weeks and then it just wouldn't turn on. My friend took the computer to Geek Squad and they plugged in a different power supply and it seemed to turn on fine. So we thought that his PSU was dead and he has had two replacements from corsair in the last month and we determined the PSU isn't the problem. He did the paper clip test and the PSU was working.

Here are his specs

CASE
http://www.newegg.com/Product/Produc...82E16811119213

HDD
http://www.newegg.com/Product/Produc...82E16822152185

MOBO
http://www.newegg.com/Product/Produc...82E16813128498

CPU
http://www.newegg.com/Product/Produc...82E16819115072

Heatsink
http://www.newegg.com/Product/Produc...82E16835118223

RAM
http://www.newegg.com/Product/Produc...82E16820233144

GPU
http://www.newegg.com/Product/Produc...82E16814161372

PSU
http://www.newegg.com/Product/Produc...82E16817139009

CD/DVD
http://www.newegg.com/Product/Produc...82E16827106335
 

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Every single one of them links is a bad request.

Because they have ... in them.
 

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Quote:


Originally Posted by SharpShoot3r07
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My friend took the computer to Geek Squad


I think this will become a demotivational poster.

"Well there is your problem"
 

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Discussion Starter · #6 ·
Quote:


Originally Posted by olli3
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Can you elaborate a little? When you say it doesn't turn on, does it literally do NOTHING, or does something spin up but just not post?

Well when we first built it it would turn on for about 2 seconds then die. We were stuck on why that was happening for about an hour. Finally my friend took the power cable and cleaned it off and for some strange reason it turned on. Now my friend is saying that the computer wont even turn on. Nothing lights up or starts to spin.
 

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Discussion Starter · #8 ·
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Originally Posted by Shaun1991
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Did you guys make sure you put in mobo standoffs?

I've built 4 comps before and have never heard of "mobo standoffs". Could you please explain? I just don't understand how it worked for a week or two then just decided to not turn on
 

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Could the motherboard be grounding out on the case? Are there motherboard mounting posts under the board and touching it where there are no screw mounting holes?

The next step is to pull the motherboard from the case, set it on the box it came in, and leave the CPU/HSF, ram, and video card installed. Then plug in the power supply connectors (main power 24 pin, Video card 6 or 8 pin and CPU 8 pin). Then see if the system boots.

Quote:


Originally Posted by SharpShoot3r07
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I've built 4 comps before and have never heard of "mobo standoffs". Could you please explain? I just don't understand how it worked for a week or two then just decided to not turn on


Theese are standoffs/mounting posts:



if you have a post mounted where it says, "don't match" in the below link, it will ground out the board which means it won't boot:

http://forums.hardwaresecrets.com/gr...bo-chasis/4488
 

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Quote:


Originally Posted by SharpShoot3r07
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I've built 4 comps before and have never heard of "mobo standoffs". Could you please explain? I just don't understand how it worked for a week or two then just decided to not turn on


Did you use any of these?

Also, you say it worked at first when you cleaned the power cable, have you tried a different power cable with these new PSU's or did you use the same one? That could be the problem.
 

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Discussion Starter · #11 ·
Quote:


Originally Posted by olli3
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Did you use any of these?

Also, you say it worked at first when you cleaned the power cable, have you tried a different power cable with these new PSU's or did you use the same one? That could be the problem.

yes, of course.
 

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You probably don't have enough motherboard standoffs and it could just be that its always touching the tray now.

And geek squad is nothing more then someone needing a 9-5 job
 

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Discussion Starter · #13 ·
If the standoffs were in wrong in the first place then why would the computer turn on? I'm on the phone right now having my friend check all these things.
 

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It was said earlier, but i'd really recommend you stripping it out of the case and setting it up on a box or wooden table to make sure it's not shorting on the case, also if it still doesn't boot you can rule that out, then move onto the next step which should be checking all the pins from the psu and where they connect to on the board making sure none of them are broken or bent etc, Might be a good idea to give all the sockets a blast with compressed air including the CPU socket also checking for damage or bent pins.
 

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Quote:


Originally Posted by SharpShoot3r07
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If the standoffs were in wrong in the first place then why would the computer turn on? I'm on the phone right now having my friend check all these things.

Because the standoffs can contact the traces and components soldered to the board which will short them.

I learned this years ago when. I bought my brother a new CPU and motherboard to replace his outdated setup. He could not get it to power on, and called MWave, where I bought it from (I was stainoned in Europe, so i couldn't look at it). He lived within 20 min of their facility, so they told him to drive down. He brought the entire setup, and a tech pulled the board, attached it to a test bench and fired it right up. He then placed the board in my brother's case and showed him the 3 additional standoffs, pulled them out, and remounted his board. it worked after that.

And this problem crops up on here every few months or so.
 

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Discussion Starter · #16 ·
Ok, my friend said that the computer turned on with a different PSU. Does that mean that the standoffs are in correctly? Why wouldn't his original PSU work?
 

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Quote:


Originally Posted by SharpShoot3r07
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Ok, my friend said that the computer turned on with a different PSU. Does that mean that the standoffs are in correctly? Why wouldn't his original PSU work?

You should still check the standoffs if you are not 100% sure. But if you are sure there are no stray ones, I wouldn't worry about them.

As for the PSU, there is a chance it is faulty or is going bad. Ive seen a small selection of PSUs that have compatibility issues with a few boards. The Antec 1000w and the eVGA SR-2 come to mind. But I don't think it was a compatibility issue.
 

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Discussion Starter · #18 ·
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Originally Posted by ericeod
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You should still check the standoffs if you are not 100% sure. But if you are sure there are no stray ones, I wouldn't worry about them.

Ok, I'm having him test it out of the case and then having him re-arrange the standoffs so that they are matching.
 

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Quote:


Originally Posted by SharpShoot3r07
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Ok, I'm having him test it out of the case and then having him re-arrange the standoffs so that they are matching.

Perfect. At least you will be sure. I'm sure all of us have come up against something that just doesn't make sense to us. I've had a board not boot, and changing the bios chip fixed it. So for some reason the original bios chip got corrupted. It was not flashed or anything, it just happened. It was a Lanparty NF4-SLI motherboard BTW.
 

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Motherboard could be shot? Ram faulty? CPU Dead? Try new ram first, if that doesn't work replace the motherboard.
 
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