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No power to PC after changing CPU heat sink

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January 12, 2014 12:45:30 PM

I justchanged my stock cooler for a coolmaster hyper 212, i changed the thermal paste and used Akasa TIM cleaner to get the old stuff off, i made sure i had no static.

I did see a little paste go on the side of the CPU but got it off without a trace left. I put it all together and was carefull all the way but now it wont power on at all. It isnt the PSU or case etc as i put my old mobo and cpu back in and they are working fine....

any ideas if its the cpu or the mobo thats dead?
a c 87 à CPUs
January 12, 2014 1:03:29 PM

Slash2004 said:
I justchanged my stock cooler for a coolmaster hyper 212, i changed the thermal paste and used Akasa TIM cleaner to get the old stuff off, i made sure i had no static.

I did see a little paste go on the side of the CPU but got it off without a trace left. I put it all together and was carefull all the way but now it wont power on at all. It isnt the PSU or case etc as i put my old mobo and cpu back in and they are working fine....

any ideas if its the cpu or the mobo thats dead?


did you but the backplate on the correct way there would have been a type of layer that prevents it shorting out the board make sure this part is facing the board or youll just short the board
January 12, 2014 1:12:33 PM

im pretty sure i put it on the right way, there was only one way and i watched a you tube vid on how to install as well as looking at the instructions.

it couldnt have crushed the cpu by going on too tight?

http://www.youtube.com/watch?v=OrnWVHdhGJ0 9:59 is the back plate, didnt see the edit button before :/ 
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January 13, 2014 11:18:10 AM

beyondlogic said:
Slash2004 said:
I justchanged my stock cooler for a coolmaster hyper 212, i changed the thermal paste and used Akasa TIM cleaner to get the old stuff off, i made sure i had no static.

I did see a little paste go on the side of the CPU but got it off without a trace left. I put it all together and was carefull all the way but now it wont power on at all. It isnt the PSU or case etc as i put my old mobo and cpu back in and they are working fine....

any ideas if its the cpu or the mobo thats dead?


did you but the backplate on the correct way there would have been a type of layer that prevents it shorting out the board make sure this part is facing the board or youll just short the board



Can anyone help me out here please, sorry the above wasn't well wrote i did it in a rush on my phone.

I'll start again:

I basically installed a new heatsink/fan as i was getting temps I considered a little high. I took the motherboard out and made sure I was grounded whenever I handled it, I had the mobo placed on the anti static sheet it came in.

I used Akasa TIM clean solution to remove the thermal paste. I made sure I didn't touch any components when installing the new back plate, could I have maybe tightened them too tight?

When I screwed on the heat sink I tightened the spring loeaded screws about half way, could this of hurt the CPU?

I did notice a very small amount of Thermal Paste come out the side of the heat sink and went down the side, it was on the green part of the CPU. I used a small amount of solution to remove this? Could this have shorted the CPU? If so is that the end of it or would it dry and eventually work again? How hard is it to kill a CPU as I was being very gentle and careful at each step.

I remounted the mobo to the case and made sure it wasnt touching any part of the case so it wasnt this shorting it. Then when i tried to turn it on I got nothing at all.

Now I then reinstalled the old mobo I have and that booted fine so it cant be the case or PSU.

This leaves me, RAM, CPU or MOBO. It is currently under warranty what would be chances of returning as surely it shouldnt just die from having a heat sink changed?

Also I definetly did not touch any part of the mobo with any tools etc. I did notice though the screws for the new backplate were a tiny amount off the printed "rings", could this be a contributing factor?

Any help or advise is greatly appreciated.

Thanks

Edit: I reinstalled the previous back plate and cooler but still same issue. Also could I remove the CPU and try to get the mobo to at least switch on to try eliminate something? I hope its the mobo and not CPU or RAM though as that was the cheapest component and i should have perhaps invested in a better mobo anyway,
January 13, 2014 11:25:58 AM

So just curious, was the original heatsink using Intel's stock push-pin mechanism?
January 13, 2014 11:29:57 AM

deltapapazulu said:
So just curious, was the original heatsink using Intel's stock push-pin mechanism?


My apologies I am using a AMD AM3+ here are my specs:

MotherBoard: Gigabyte GA-78LMT-USB3
CPU: AMD FX8350 Octo core 4ghz
RAM: 16 GB DDR3
Hard drive: 2 not sure of the make they are 500gb standard HD's and a Kingston 120gb SSD
PSU: Power Cool 80+ 650W
Graphics: SFX AMD Radeon 7850 2GB

Thanks
January 14, 2014 9:45:15 AM

bump, could do with some advice :) 

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a b à CPUs
January 14, 2014 10:27:19 AM
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check your connection on motherboard of power switch, make sure they are connected correctly.
January 14, 2014 3:07:10 PM

Sorted it thanks, turned out to be the RAM it must not have been seated properly.
a b à CPUs
January 14, 2014 7:05:57 PM

Slash2004 said:
Sorted it thanks, turned out to be the RAM it must not have been seated properly.


Good Luck :) 
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