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Broken Heat Sink Clip - Best Avenue of Repair


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#1 whoabuddy

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Posted 09 February 2013 - 01:59 PM

Hello,

 

I was working on a server yesterday, when I removed the riser card it grabbed a clip on the heatsink covering the MCH processor, and the clip popped out of the board.  I have a picture below of the board and the area the piece that popped out: (hi-res image at http://www.dataadmin.net/temp/poweredge2800motherboard.png)

 

 

The clip itself has two thin metal legs, a plastic piece that butts up against the motherboard, then the metal forms a loop where you attach the heatsink.

 

My question is: would it be better to try and solder this piece back on or just reattach it with super glue?  Are there any alternatives to hold the heatsink to the board instead of the clip?  Like special two-sided tape? 

 

I think I will be able to figure it out, but I am curious to see what others think or have experienced.

 

Thank you for your time,

whoabuddy


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#2 computerxpds

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Posted 09 February 2013 - 02:07 PM

Hello,

I would say its personal preference, and how good you are with solder and super glue, I don't think any tape exists for something like that then again I could be wrong, haven't really had the need to look around hard enough for some. If it attached with solder originally then I would at least try that, like I said imo its just up to you in terms of what you want to do and are comfortable with doing to it.
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#3 whoabuddy

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Posted 13 February 2013 - 11:06 AM

Hi computerxpds,

 

Thank you for your prompt reply, I was actually working on the server later that day and things went very well.  I decided to use super glue because it would have been difficult to get a good position to solder, however after reading some excellent information on super glue I applied thin layers, allowed sufficient dry time, and applied pressure to help seal the bond.  So far, so good, and I just checked on it again while replacing a SCSI card yesterday.  I took some pictures to help explain the process if anybody is interested, this may go up on my blog as well, and all descriptions contain links to the full-size image.

  1. Example of a similar heat sink on the motherboard

    1_example.png
     
  2. Broken clip next to hole it's supposed to be inserted into

    2_brokenclip.png
     
  3. MCH and Heatsink before cleaning

    3_beforecleaning.png
     
  4. MCH after cleaning - much shinier!

    4_aftercleaning.png
     
  5. Application of silicone heat transfer compound

    5_newheatcompound.png
     
  6. Heat sink reassembled on MCH, without riser

    6_reassembled_withoutriser.png
     
  7. Heat sink reassembled on MCH, riser installed

    7_reassembled_withriser.png

    Note: Those plastic blue pieces are what originally grabbed the heatsink and pulled the clip out - don't forget to check and double check when pulling components!

Funny thing I noticed today - title should read "Broken" not "Borken" - guess you can tell I was a little rushed at the time!

 

Best Regards,

whoabuddy

 


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#4 rotor123

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Posted 13 February 2013 - 01:50 PM

While I was at it I fixed the spelling of the message title.

 

I always re-soldered those. I don't trust Crazy glue that much.

 

Also On certain model Dells that is part of a circuit that is used to protect the Chipset . The metal spring clip across the chipset's heatsink between the two metal hoops completes the circuit. If one of them pulls out the motherboard detects that and shuts down with a warning message.

 

I'd say you are lucky that wasn't case on your motherboard.

 

Good Luck

Roger


Edited by rotor123, 13 February 2013 - 01:52 PM.

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#5 whoabuddy

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Posted 13 February 2013 - 02:18 PM

Hi Roger,

Thanks for fixing that!

That makes sense too, I was curious why they would be connected that way, and fortunately I didn't run into any issues or messages like that. I will keep that in mind for future installations though, and I will post an update if there is ever an issue with the motherboard I repaired. I thought super glue would be appropriate after reading this article on how the chemicals work: http://www.ipmsstockholm.org/magazine/2004/10/stuff_eng_tech_ca_glue.htm

Next time I will think twice about using it.

Thank you for your time,
whoabuddy
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