Can't get computer to start

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hustomaten

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Nov 26, 2015
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Hi so I'm building my first computer and I can't get it to start. I've tried bredboarding and then the fans always starts up for a second or two and then turns off and then starts normally. It always stop once even with only CPU connected, on the second start with all the basic components it was able to get to the BIOS when I connected it to my monitor. I sent in my motherboard to see if anything was wrong with it and they said a pin was bent in the CPU socket but they corrected it and they got it working after that. It's still the same problem for me though so I asume it's the CPU that's the issue, what I wonder is if it's some test or something I can fix with it or if I have to buy a new one? I kinda managed to get some thermal paste on the wrong side once when I was testing what was wrong (before I sent motherboard in) so I don't think I'll get the money back for it even if I tried cleaning it with some isopropanol. I guess the pin might have caused the issue at first and now it's the CPU or something. Anyway any kind of help is greatly appreciated since I don't know what to do right now.

Here's my specs:
Intel core i5-4690K processor (new)
EVGA Supernova 750 G2 power supply (New)
Gigabyte ultra durable Z97P-D3 moterhboard (new)
Think graphics card is: NVIDIA geforce750 ti but a bit uncertain right now, worked fine before
RAM: DDR3 XPG 2x4GB (new)
 
Solution
Poprin
So when you say everything connected what else are you connecting? If you know it will boot the BIOS with just CPU, RAM and GPU then you need to add one component at a time to see which one stops it from booting and then you have your culprit. With troubleshooting these kind of problems, 9 times out of a 10 it's simply a process of elimination!
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Poprin

Poprin

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Dec 13, 2012
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The best way to test a board IMO is to get your motherboard box on a table with plenty of work space. Put the motherboard directly on the cardboard box as it is in no way conductive. Then for a machine to boot to bios the minimum you need is the CPU installed (with cooler) and one stick of RAM and the PSU connected to the main header and the 12v auxiliary (4 or 8 pin depending on board). If you can do this and get to BIOS then you are getting somewhere. (You can turn the board on by carefully connecting the two pins on your board with a flat head screwdriver labelled for your power on switch, effectively creating a circuit the same as clicking the button does. I do emphasise the word CAREFULLY here as you don't want to go poking a live mobo with a metal rod)

Then once you can do this I would advise creating a Linux live USB so that you can boot into a Linux operating system via USB to confirm that the machine will boot on OS. Once you have got this far then you are in good shape. You can then look to install the board with attached components into your case and start installing the remaining components.

If you have thermal paste on your CPU get something like Arcticlean thermal paste remover and some cotton buds. Put the articlean on the cotton bud and use it to carefully try to remove the residue from the contacts. So long as you make sure the CPU is completely dry before re-installing it you should not cause any damage to the CPU. If you have a conductive type of thermal material (like arctic silver) then you really need to get that off the contacts before trying to re-install the CPU.
 
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hustomaten

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Nov 26, 2015
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I did get it to BIOS by only having RAM, GPU,CPU and power connected on top of the box and shorting it but I don't have an USB that I can use to get the Linux live USB yet. When I tried it with everything connected the fans barely started spinnig a cm and then stopped. When I'm trying to remove the thermal paste it's not visible when you look at it normally but if you take a flashlight from the side you can see it's still some of it left. I'm not able to get that away by using cotton buds and isopropanol. Thanks for the answer btw!

 
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Poprin

Poprin

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Dec 13, 2012
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So when you say everything connected what else are you connecting? If you know it will boot the BIOS with just CPU, RAM and GPU then you need to add one component at a time to see which one stops it from booting and then you have your culprit. With troubleshooting these kind of problems, 9 times out of a 10 it's simply a process of elimination!
 
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Solution
H

hustomaten

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Nov 26, 2015
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4,540


Oh, I mean I put it in the case and connect everything, I thought everything needed to be plugged in for it to work. But it doesn't matter that it stops once before it starts up to BIOS when it's outside the case then? I'll try to connect one thing at a time when the CPU is dry then. Do you have any idea how long I need to wait before I can be sure it's dry?
 
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hustomaten

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Nov 26, 2015
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It seems like it's working now, by doing as you said and connecting one thing at a time it showed that I couldn't have the sys fan pin connected to the motherboard. I guess my case is too old to support that and made some struggle but thank you a lot a can't believe that I didn't just try connecting everything one piece at a time.
 
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Poprin

Poprin

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Dec 13, 2012
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No worries I'm really glad you got it going, don't want you to do your first build and get put off by issues!
 
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