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T42p GPU Thermal Compound

T40/T41/T42/T43 series specific matters only
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ragger
Posts: 12
Joined: Thu Nov 20, 2008 10:19 pm
Location: Nutley, NJ

T42p GPU Thermal Compound

#1 Post by ragger » Wed Sep 26, 2012 2:39 am

I've just completed a GPU reflow on a T42p and noticed that the long fan covering the GPU has some hardened black material unlike the white thermal grease used on the CPU. Can anyone identify it or suggest a suitable replacement so that it can be reassembled?
A31/P, R51, all FlexView; X20(2), 390E, 240X(2), 600E/X, 570E(2) ,765D, 760ED, more docks than Norfolk & more on the way

Johan
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Re: T42p GPU Thermal Compound

#2 Post by Johan » Wed Sep 26, 2012 3:14 am

IBM T42p's (2373-Q1U & -Q2U): 2.1 GHz, 15" UXGA FlexView, 2 GB RAM, 128 MB FireGL T2, 128 GB 1.8" SATA SSD, IBM a/b/g, BT, Win 7 Ultimate
IBM T42 (2373-N1G): 1.8 GHz, 15" SXGA+ FlexView, 2 GB RAM, 64 MB Radeon 9600, 64 GB 1.8" SATA SSD, IBM a/b/g, BT, Win 7 Ultimate

ragger
Posts: 12
Joined: Thu Nov 20, 2008 10:19 pm
Location: Nutley, NJ

Re: T42p GPU Thermal Compound

#3 Post by ragger » Thu Sep 27, 2012 6:16 am

Thanks for all the reading tips. I cleaned off all the black gunk from the GPU and under the heat sink. When I dry fit the fan back onto the MB, it fits snugly over the GPU. There's a copper shim that fills the gap so it doesn't look like there is any room for a 2mm thermal pad, or even a 1mm. Is there a special compound like the original or can I just use the white thermal grease? The top of the GPU is flat and smooth.
A31/P, R51, all FlexView; X20(2), 390E, 240X(2), 600E/X, 570E(2) ,765D, 760ED, more docks than Norfolk & more on the way

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