Stuck old heat sink

Discussion in 'Hardware' started by loninappleton, May 23, 2014.

  1. loninappleton

    loninappleton Corporal

    I've seen here where the heat sink is stuck to the cpu in other questions and that is to be expected.

    But...

    When troubleshooting another problem I wanted to re-seat the processor. I thought: just pull out the heatsink and cpu after releasing the catch on the AMD.

    Well nothing budged.

    As I recall this was a heavy thermal grease pre-appied application and back then I wasn't much concerned of the amount used.

    But what is sticking between the cpu assembly and the socket?

    What could nudge it loose?

    I saw a can opener mentioned. And right now I don't have to pull it. But what's the answer? Is it a common problem?
     
  2. DavidGP

    DavidGP MajorGeeks Forum Administrator - Grand Pooh-Bah Staff Member

    HI

    Just so I have this in my head ok, the CPU is not stuck in the "socket" of the motherboard but your question is on the CPU chip and its attachment to the heatsink?

    If stuck in the socket then that's a dicey one as you can break pins if not careful, but if its the CPU to Heatsink then while the CPU is still in the socket and the heatsink is released from its bracket you could use something plastic over a can opener (that would damage the top of the CPU) and some acetone on the plastic item to loosen the thermal paste.

    Also it would be best to attempt taking the heatsink off a CPU after the PC has been used as its hot still or use a hair dryer aimed at the connection to heat up the area then use a plastic spatula or item and a small twisting motion to loosen the grip.



    **But as always its not an exact science and things can go wrong so all suggestions are with user beware notice, as while I may have tried the above and worked for me, it may not for you**
     
  3. loninappleton

    loninappleton Corporal

    My subject could have been phrased more accurately I have no need to separate the heat sink and cpu. But giving a tug on the loosed apparatus to the socket is fuzed or so tight that removal cannot be done by simple lifting.

    I won't risk pin damage until the board is on it's way to the recycle company. I got around a problem which I thought might require pulling and re-seating the cpu in it's socket.
     
  4. DavidGP

    DavidGP MajorGeeks Forum Administrator - Grand Pooh-Bah Staff Member

    Yeah if at all its not worth attempting to remove a stuck CPU from the motherboard socket unless really needed as its prone to breaking pins if not done carefully enough. So glad you managed to get around the issue.
     
  5. loninappleton

    loninappleton Corporal

    Not [solved] necessarily but it worked.

    I had an old unused board and sure enough that socket was stuck to the cpu as well. This is not the heat sink issue but more on that.

    The small amount of pressure at the four corners with either an appropriate size blade screw driver or stiff plastic implement (prob'ly something from the kitchen) will loosen the cpu from the socket and no pins damaged.

    If there is interest I will plug some stuff together and see if it is ok. But I'd feel confident in doing it for a real upgrade.

    The heat sink can be pried loose from the cpu in the same manner.

    Anyone know of any really stiff plastic kitchen gadgets with a handle that would prevent static or other electronic damage?

    Also any tips on getting a discarded AM2 four core cpu? I have checked the usual source and no deals are showing. My limit on this is maybe $10 for an AM2 Athlon 4 core.
     
  6. loninappleton

    loninappleton Corporal

    The best deal I could find for pry tools is here:

    http://www.amazon.com/Tools-Repair-...d=1402109783&sr=1-1&keywords=plastic+pry+tool

    I looked locally but $1,76 for 10 and free shipping -- nothing else comes close.

    Will likely order tomorrow.

    Other thought I had is just wrapping a blade screw driver with non conductive (read any non metallic) tape. But these tools have the edge and can get into tough places.
     
  7. DavidGP

    DavidGP MajorGeeks Forum Administrator - Grand Pooh-Bah Staff Member

    They seem ok as a tool Lon

    I think you just need to go slow with loosening the CPU from the heatsink or socket I do think plastic is better than as you mention a screwdriver metal edge, even with tape.
     
  8. loninappleton

    loninappleton Corporal

    Quite frankly it might never come up unless I find that Athlon II four core for $10 smackers.

    I never changed a cpu out.

    But the tools were too good to pass up.
     

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