Problems after Dissection

Discussion in 'MacBook Pro' started by adwolfe12, Sep 30, 2010.

  1. adwolfe12 macrumors newbie

    Dec 3, 2007
    I just got done replacing the MagSafe DC in board on my June 2009 MBP and am having issues with the fans constantly on. Also, the trackpad isn't sensing my finger on it.

    I thought I did some pretty good work but I guess I didn't :mad:. I took a look around but didn't see anything out of the norm but will look again.

    Anything I should be looking at specifically?

    Thanks, Alex
  2. Pax macrumors 6502a

    Dec 12, 2003
    I guess that by fan "constantly on" you mean at very high speed, loud and obtrusive.

    That's probably a problem with a temperature sensor. Either you damaged one during the dissection, or more likely you failed to plug one of the sensor leads back into the logic board on reassembly.

    If you run Hardware Test (on your install DVD) it will tell you which sensor is faulty, but it can be a bit cryptic in its description and require a bit of Googling to relate the fault code to an actual sensor.

    Hopefully you can spot a "spare wire" and just plug it back in.
  3. moel macrumors 6502

    Nov 7, 2007
    Either you fried something, or you left the trackpad cable and fan cable unplugged inside the machine
  4. R94N macrumors 68020


    May 30, 2010
    Yeah, if the temperature sensor is unplugged or broken the fans will just keep running fast all the time because it's got no idea how hot the computer is anymore.

    I think both of these issues have been caused by you either forgetting to plug things back in, or them just falling out when you were putting everything back together :)
  5. adwolfe12 thread starter macrumors newbie

    Dec 3, 2007
    I looked at it again last night and didn't see anything lose or what looked to be broken. I don't think I sensor is broke because smcfancontrol sees the temp and so does iStat pro.

    I'll do a hardware check and see what comes up.

    Thanks, Alex
  6. pvmacguy macrumors 65816


    Sep 2, 2009

Share This Page