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Strange Material on Heat Sink

post #1 of 8
Thread Starter 
Short version: opened up my HP dv7t-4100 and found some strange gunk on the heat sink (see pictures at end of post). Does anyone know what it is? Should it be removed? Any idea how to remove it?

Long version: So my laptop, a HP dv7t-4100 has always ran on the hot side, idling around 75 C, but this was manageable and never much of a problem. Recently, the temps have spiked sharply, idling around 85 C and going up to 95 C when doing something as simple as watching a netflix movie. I tried playing with fan and OS settings, but nothing helped, so I decided to open it up and replace the thermal compound. After cleaning off the old thermal grease, I encountered an odd substance on the heatsink. Note that although in the pictures it seems to be a chip on the sink, the gunk is raised off the surface.. I tried cleaning it off with a cloth and rubbing alcohol, but it didn't come off. I tried scraping it off with a small screwdriver but none of it came off. It seems like metal to me, but I cannot be sure. It could simply be very dry thermal compound but I don't think so. So, as stated above, I would love some info on what this stuff is, whether I can or should remove it, and how. Thanks so much for your help everyone!


Pictures: http://imgur.com/a/pn2LP
post #2 of 8
Looks like dried up thermal grease to me. Its possible that its caked and hardened, so this may be why its so difficult to remove. I dont see how alcohol wouldnt remove it though.

Hopefully there was a lot more compound on your cpu than that biggrin.gif.
post #3 of 8
Thread Starter 
Haha, yeah there was a lot more than that, once I removed the rest I discoverd this gunk. Thanks. I guess I will just sit there and slave away with some alcohol on it. Thanks
post #4 of 8
Or try goof off, my friend swears by it, of course finish with alcohol

sent from my sprint HTC supersonic using tapatalk
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post #5 of 8
Old thermal paste is what it appears to be. Pics are a bit blurry though
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post #6 of 8
Thread Starter 
Alright, it seems like the consensus is that it is just a bunch of really dry thermal paste. Thanks OCN, you guys are great.
post #7 of 8
I wonder if they used a bit of thermal adhesive as well as thermal paste...maybe to help fasten/fix the heatsink in place better since laptops are meant to move around. Would explain the chunk of hardened "like metal" gunk.
     
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post #8 of 8
Use lighter fluid to get it off - Ronsonol (sp?) is the brand i use, but any lighter fluid that can be used in a zippo works just the same. Cleans much better than alcohol and doesn't leave any residue whatsoever.
    
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