On 10/18/09, Don Zahniser wrote: As I had taken my Pismo apart recently, and this question is very relevant to my computer, I decided to do a quick take-apart to verify what is in mine. Note that when I took it apart, it had been on for a couple of days, but asleep for probably half an hour. Of the hard drive, Airport card, and shield over the CPU, the warmest to touch was the Airport card. > >On 10/18/09, MacDirk wrote: > >>But yet another QUESTION: >>How does the upperside of your CPU with removed heatsink look like? >>In my case there's a soft grey sticker/label (I'm not english, so I >>hope one of the expressions might be appropriate).
My particular Pismo has the all-metal heatsink-heat pipe-heat dissipator combination. There's also a metal heatsink-heat pipe-composite material assembly that is in my 'parts' Pismo. The metal heatsink that rests on top of the CPU had the grey residue. It had an irregular surface, and looked like it wasn't capable of making a good thermal contact with the CPU. I scraped that off with my favorite tool (thumbnail) and got down to what looked like tape adhesive. I cleaned that off with 'mineral spirits' (a.k.a. charcoal lighter) on a cotton swab until I was down to bare metal. There was a little of the grey stuff still on the copper-looking CPU chip surface. I also cleaned that off until I got what looked like bare metal. All I had on hand for thermal paste was some generic white heat sink compound that came from Radio Shack. Better than none (and better than what was there before). I used an amount that was probably less than the volume of a grain of rice. I positioned the heat sink on the CPU, then removed it to verify coverage. The amount I added was a tiny bit more than needed. I cleaned it off, reapplied, and then reassembled. I was careful to start the two torx screws over the CPU before the Phillips that secures the heat dissipating end. I also carefully screwed down the two torx screws, trying to make sure that I did not overtighten one, on the theory that it could 'rock' the heat sink off the CPU on one side (although I suppose the plastic tabs on either side of the CPU where the screws go would minimize this). Reassembled and back in business typing this note. - Don --~--~---------~--~----~------------~-------~--~----~ You received this message because you are a member of G-Books, a group for those using G3 iBooks and PowerBooks (we run a separate list for G4 'Books). The list FAQ is at http://lowendmac.com/lists/g-books.html and our netiquette guide is at http://www.lowendmac.com/lists/netiquette.shtml To post to this group, send email to [email protected] For more options, visit this group at http://groups.google.com/group/g-books Support for older Macs: http://lowendmac.com/services/ -~----------~----~----~----~------~----~------~--~---
