I swap my old motherboard with the damage motherboard of my cousin. I mean I replace his motherboard and uses his all hardware as well as the casing and heatsink. Basically I did this because I want to use the old parts of his PC (RAMs,HDDs,Graphics card, etc) and my heatsink also is unusable so I also need to remove his heatsink to transfer it on my motherboard. But I am having a hard time figuring out how to remove the remaining stand-offs of this heat sink, because there's no instruction or any label or whatsoever on how to remove this stand-offs. If you guys have an idea how to remove this stand-offs please do help, because this is the only thing that left so that I can use my old motherboard and give a new life on it. it's kinda old but this motherboard still works and I love to rebuild this machine and power it up again and install a good Linux distro on it. So need your help guys.

P.S. I hope I picked the correct forum section...
You see at the bottom left of the picture of the second one, which stand-offs (black one) i cut it using a diagonal cutter and no luck on removing it. I also tried to push the white circles still doesn't work at all. It just hurt my hands and screws to never works because that white rounded circles doesn't have a groove to where a flat screwdriver could fit it.
