Computer keeps rebooting after installing same cpu fan

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ISTI

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Jul 20, 2014
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i was usuing my pc ok....today evening i decided to clean up my pc...so i unplugged my gpu..hdd...cpu..cpu fan....make them clean ,,,apply thermal paste and reinstalled my processor and cpu fan and everything else...now my pc starts and there comes nothing in the monitor (although monitor is ok )..and my pc restarts after 15/20 seconds,....it keeps doing that....any solution please,,,,,

my rig...
gigabyte z77 HD3
CORE I7 2600
GIGABYTE GTX 970
PSU -THERMALTAKE 550W
HDD- WD BLUE 1TB
 
Solution
Shaun o
If you took the cooling solution off your cpu.
And you are using an Intel stock cooler that came with your i7 cpu.

And the cooler it`s self has push pins that you press down on.
Make sure that when you fit the cooler the push pins are seated right.
When fitting it after removing dust build up, or to apply fresh thermal compound.
Make sure you push the first pin fully down, then push the opposite corner to it.
And use the same method for the last two push pins of the cooler.

Any lift on the cooler push pins in one corner will cause a lift of the cooler contacting the cpu heat spreading plate.
It will result in when you power the system on in it not posting. due to a hot spot of the cpu heat spreading plate.
If the temp of the cpu is...
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Shaun o

Shaun o

Illustrious
Oct 7, 2007
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If you took the cooling solution off your cpu.
And you are using an Intel stock cooler that came with your i7 cpu.

And the cooler it`s self has push pins that you press down on.
Make sure that when you fit the cooler the push pins are seated right.
When fitting it after removing dust build up, or to apply fresh thermal compound.
Make sure you push the first pin fully down, then push the opposite corner to it.
And use the same method for the last two push pins of the cooler.

Any lift on the cooler push pins in one corner will cause a lift of the cooler contacting the cpu heat spreading plate.
It will result in when you power the system on in it not posting. due to a hot spot of the cpu heat spreading plate.
If the temp of the cpu is high because of this it will prevent post and full power up of your system to stop your i7 cpu from burning out. Via the thermal control of the bios as one of the first checks it performs.

You need to double check that the cpu cooler is firmly, and flush fitting and in full contact of the i7 cpu heat spreading plate.
This often happens because of a bit of flex in your motherboard and if using a push pin type fixing of the cooler improper latching through the motherboard due to the slight flex that happens when you apply pressure pushing the pins down.
 
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