Small cardboard part left after closing MBP (AB990SM/A)

Discussion in 'MacBook Pro' started by macstuart, Dec 23, 2010.

  1. macstuart macrumors newbie

    Dec 23, 2010
    Yesterday I changed the RAM of my Macbook Pro 13" (AB990SM/A)
    I successfully expanded it from 2 to 8GB, everything works fine so far.

    However after closing the MBP, there was a small piece of cardboard left on my table. I made a photo of it:
    So I opened it again and tried to find where this piece belongs to.

    After searching about an hour plus searching the internet up and down for another hour I could not find any useful or logical information about this piece.

    I ended up closing the MBP and start to work without the piece, but I'm worried. Perhaps some of you have experience with this?
  2. mulo macrumors 68020


    Aug 22, 2010
    Behind you
    looks like something that sits around a fan somewhere.
  3. macstuart thread starter macrumors newbie

    Dec 23, 2010
    yes, perhaps, but I was really not able to find where the piece of puzzle fits.
    maybe someone has a photo of can explain?
  4. deeddawg macrumors 604

    Jun 14, 2010
    Have you reviewed the various disassembly/reassembly guides on

    I glanced there but couldn't find the part # you listed; but I'm a newbie to the Mac world so I'm not familiar with models to part #'s.
  5. macstuart thread starter macrumors newbie

    Dec 23, 2010
    yes I had a look there before I posted here, but couldn't find a photo containing the part.
  6. Richard1028 macrumors 68000

    Jan 8, 2009
    Does it go any where near the drive?

    The rounded corners tell me it's made to fit inside an enclosure of sorts.

    Not much help. Sorry.
  7. Apple OC macrumors 68040

    Apple OC

    Oct 14, 2010
    small? ... it looks huge.

    no seriously ... send an email to Apple customer service.
  8. al2o3cr macrumors regular

    Oct 14, 2009
    The first letter of the model number is throwing people off - it should be an 'M', which makes your MBP a 2009 13.3".

    The curved shape of the cardboard reminds me of the cutout on the logic board for the fan shroud (see for a photo) but I can't figure out where the two screws that were contacting the cardboard would fit on the logic board. (on the top, towards the right and on the bottom at the rim of the curve - note the indentations from what I'm presuming was a screw head)
  9. macstuart thread starter macrumors newbie

    Dec 23, 2010
    It is indeed small, like max. 40x40mm
    I have tried several positions to put it, without a finding one that makes sence.
    It looks looks like an isolator or a cushion.
    It fell on the table somehow when I cleaned the bottom panel of the mbp.
    It drives me nuts...
  10. plinden macrumors 68040


    Apr 8, 2004
    It would probably be more useful to take a photo of it beside, or on, your MBP with the electronics exposed so we have context, and include a ruler.
  11. ouimetnick macrumors 68020


    Aug 28, 2008
    Beverly, Massachusetts
    It prevent the logic board from shorting out if the bottom case is pressed too hard.
  12. macstuart thread starter macrumors newbie

    Dec 23, 2010
    first, sorry for the confusion with the product number! :D

    yes it's a 2009er 13.3 inch with 2.26 GHz C2D

    @ouimetnick I guess that it is, rather than the fan
    but where the heck is it placed correctly

    i checked these photos not finding the piece, nor a proof that it isn't belonging to the mbp, which i doubt since i opened it on a clean, blank table with no things laying around."_Unibody_Mid_2009
  13. Kenndac macrumors 6502


    Jun 28, 2003
    I'm fairly sure it sticks to the inside of the bottom cover to prevent the metal touching a particular part of the machine's internals.
  14. al2o3cr macrumors regular

    Oct 14, 2009
    That reminds me - it's hard to find photos of this, but the MBP bottom case (the plate you remove first) has some insulating bits glued (?) to it that are roughly this shape, for the exact reason oumetnick suggested. Can you post a photo of the *inside* of the bottom case? I suspect this bit has either fallen off or was an "extra" that ended up in the case...
  15. Ifti macrumors 68000

    Dec 14, 2010
    I dont think there is anything on the inside of the bottom case.

    Take a look at my YouTube Videos, as I open the system up when upgrading my SSD and RAM etc. Maybe you can spot it in my video?

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