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Computer won't start up, CPU fan spinning fast and then reboots

Last response: in Systems
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January 17, 2013 1:26:11 PM

Hello,
I have a problem with my mini itx build.
Silverstone sst sg05b case
Gigabyte h77n wifi board
Intel i5 3570k processor with CPU fan
Provided psu has 300w and 80+ spec

Here's a link to a video of my issue...
The only problem I can think of is that there is a problem with the CPU but I can't be sure

http://tinypic.com/player.php?v=5xtlzr&s=6
January 17, 2013 1:59:16 PM

i think that its the psu.
January 17, 2013 2:10:32 PM

I tested the psu with a power supply tester and it was all fine
Related resources
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January 17, 2013 2:16:49 PM

Did you remove the little plastic bit covering the thermal paste on the heatsink? Sounds like the cpu could be overheating and its shutting down to avoid damage.

have you checked the heatsink is seated correctly?
January 17, 2013 2:23:50 PM

I've moved the CPU to the second board yesterday so I had to apply a new layer of thermal compound, the original layer has been removed. I didn't use any cleaner though so I'm going to try that now. Any tips on how to apply new compound? Also how would I know if the heat sink wasn't sitting properly? I screw the four legs in after pushing them down.
a b à CPUs
January 17, 2013 2:28:49 PM

Thin but not too thin, basically you want an even spread without lumps or built up areas, lots of people use a credit card. Just have to gauge it by looking really, make sure its got good contact.
January 17, 2013 2:31:29 PM

Should I apply it to the heat sink or the CPU plating?
January 17, 2013 2:33:01 PM

Oh also, I can borrow a psu from work tomorrow and test over the weekend. Will it matter if the psu isn't 300W? It'll most likely be 450.
a b à CPUs
January 17, 2013 2:35:24 PM

As long as it's a good brand it'll be fine. I don't think it should matter which you apply it to as long as there's good contact between the two, want to get it into position first time really so there's minimal movement/adjustment afterwards.
January 17, 2013 2:51:23 PM

Just applied more compound in a small line on the CPU.
Same problem occurring. I'd like to believe its the psu but I am skeptical. Hopefully if it ends up being the CPU I can replace it.
a b à CPUs
January 17, 2013 2:57:20 PM

Define a small line? it should cover it entirely. When i said thin i meant a thin layer, not a line, hope that wasn't what made you do it.
a b à CPUs
January 17, 2013 3:33:22 PM

I guess that's correct then
January 17, 2013 3:34:45 PM

Rather strangely, I've noticed that if I rapidly press the eject button on the front panel, it stays on for a few more seconds
a b à CPUs
January 17, 2013 3:39:38 PM

That is odd, im a little lost for what else to do.
January 17, 2013 3:42:37 PM

Well I'll borrow a psu from work tomorrow (granted we aren't all snowed in) and ill post the results
a b à CPUs
January 17, 2013 3:48:43 PM

Sounds like a plan, good luck, with both the PSU and the snow.
January 18, 2013 5:46:34 AM

Well it looks like my workplace has closed because of the weather, this'll have to wait until Monday
a b à CPUs
January 18, 2013 6:39:50 AM

At the very least you've got a day off work :)  Post back when you get an update.
January 19, 2013 2:54:42 PM

Good news, I went on a hunch and now the computer is working. The CPU seems to have been faulty so I ordered a replacement and all is good. Just need to hope that amazon take the return happily.
a b à CPUs
January 20, 2013 7:17:53 AM

Gilgada said:
Good news, I went on a hunch and now the computer is working. The CPU seems to have been faulty so I ordered a replacement and all is good. Just need to hope that amazon take the return happily.


Nice work, glad you managed to locate the problem. Good luck with the return :) 
!