PC won't boot up after being cleaned

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Mrtaaco

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May 1, 2014
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Hi all.
So I decided to give my PC a good cleaning. This included me removing the CPU heat sink and replacing the thermal paste. After doing so I booted up my pc normally and a few hours later saw that my CPU temperatures were well above normal - I realized that I didn't reinsert the heat sink properly so I repeated the whole process, except this time I removed pretty much everything from my pc (including the motherboard). One arduous reconstruction process later, the heat sink is firmly placed and all the connections are back in place - except now when I boot up my pc the fans spin for about 5 seconds before the CPU LED briefly flashes (red) and the pc turns off.

Any advice is appreciated
Thanks you in advance.
 
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nitinvaid20

nitinvaid20

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Jan 3, 2013
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check the ram sticks and i dont think applying or not apply the thermal paste has to do anything to bootup the PC
 
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kaptainkuftic

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Jul 26, 2016
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My thought was that if he applied too much thermal paste, the CPU was overheating or something.
 
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Mrtaaco

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May 1, 2014
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I didn't remove the CPU at all, only the heat sink. I put a modest amount of thermal paste on the CPU - I doubt that's the problem. I also tried removing the ram and putting it in the other slots and it still wouldn't boot properly.
 
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kaptainkuftic

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Jul 26, 2016
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We established that it doesn't have much to do with the problem at hand, but how much did you apply? You're only supposed to put on about a grain of rice sized amount.

Also, What is your full build?
 
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Mrtaaco

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May 1, 2014
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It was bigger than the size of a grain of rice but i've definitely seen people use more before and with no problems.
Here's my rig,
Intel i-5 3570 3.4ghz (not overclocked)
gigabyte geforce 760 windforce 2gb
intel dz77sl-50k
1tb HDD + 120gb SSD
Stock Intel CPU cooler (with pushpins)

If it helps in any way, the reason my CPU cooler didn't stay mounted the first time is because one of the pushpins broke, but i managed to get it through the hole and now its mounted firmly.


 
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Mrtaaco

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May 1, 2014
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It was bigger than the size of a grain of rice but i've definitely seen people use more before and with no problems.
Here's my rig,
Intel i-5 3570 3.4ghz (not overclocked)
gigabyte geforce 760 windforce 2gb
intel dz77sl-50k
1tb HDD + 120gb SSD
Stock Intel CPU cooler (with pushpins)

If it helps in any way, the reason my CPU cooler didn't stay mounted the first time is because one of the pushpins broke, but i managed to get it through the hole and now its mounted firmly.


 
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kaptainkuftic

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Jul 26, 2016
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The point of thermal paste is to fill in the microscopic gaps on the top cap of your processor, and on the bottom of the heatsync. If you add too much, it becomes insulation. Just be careful with how much you apply, a little goes a long way.

I'm not terribly sure where to go with the problem though. It's possible something got damaged, but I'm not sure
 
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Mrtaaco

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May 1, 2014
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The 4 pin socket is definitely plugged in, so is the 24 pin.
I did forget to mention that when i was cleaning off the old thermal paste i did scrape a bit of it off with my finger nail and it may have left a few mark, but note that the PC did still turn on properly after that and its only after the second attempt that is started giving me issues.
Sorry for the late replies by the way...I'm struggling with my internet as well XD
 
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kaptainkuftic

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Jul 26, 2016
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No worries mate. That shouldn't impact the CPU in any real way though.

I'm out of ideas, hopefully someone else will come along with something
 
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hang-the-9

hang-the-9

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Mar 25, 2010
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Did you go over the setup again, everything connected properly? If things are installed with no issues, motherboard or CPU may be damaged.
 
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Mrtaaco

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May 1, 2014
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Everything's connected properly as far as I can see. I doubt its a problem with the CPU... If anything its the motherboard. Is it worth a try to reset the CMOS?
 
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kaptainkuftic

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Jul 26, 2016
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why not? couldnt hurt
 
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Mrtaaco

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May 1, 2014
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So i figured out the problem... And i'm kind of hesitant to tell you guys what it was just because of how stupid it was XD but ill do it anyway...
Turns out when i was cleaning my PC earlier I decided to remove my bios jumper (for some reason that i couldnt even tell you) and i ended up putting it back in the wrong slot...
It just goes to show how much attention you have to pay to where you plug in things before you over complicate everything.
Anyway, thank you all for the help, much appreciated.

 
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