Jumpy Mouse Cursor

Discussion in 'MacBook Pro' started by TWO2SEVEN, Apr 22, 2014.

  1. TWO2SEVEN macrumors 68040

    TWO2SEVEN

    Joined:
    Jun 27, 2010
    Location:
    Plano, TX
    #1
    I recently got a used 2011 MBP. I noticed that after a little bit out usage the mouse cursor become a little erratic. I do not think that is the trackpad because it happens when I use the Magic Mouse as well. It seems to happen more on battery power than when plugged in.

    Any ideas?
     
  2. TWO2SEVEN thread starter macrumors 68040

    TWO2SEVEN

    Joined:
    Jun 27, 2010
    Location:
    Plano, TX
  3. ColdCase macrumors 68030

    Joined:
    Feb 10, 2008
    Location:
    NH
    #3
    A flakey trackpad could affect any the operation of the external mouse/trackpad. The CPU is getting inputs from both.

    Otherwise perhaps a process is hogging resources. What does activity monitor say?
     
  4. Barney63 macrumors 6502a

    Barney63

    Joined:
    Jan 9, 2014
    Location:
    Bolton, UK.
    #4
    The battery isn't expanding beneath the trackpad is it.

    Barney
     
  5. velvetlounger macrumors member

    velvetlounger

    Joined:
    Jun 12, 2012
    #5
    This just happened to me yesterday. I found that my power supply is the culprit.

    My battery was completely drained. I plugged it in and started using the computer. I noticed that the mouse would jump around even if I just placed my finger on the touchpad. If I also touched the body of the computer the jumping would stop.

    When I unplugged the power supply everything worked normal. It was then that I felt my powerbrick was too hot to touch. After the battery was charged and the powerbrick had cooled down the problem went away.

    I bought my laptop refurbished from Gainsaver. Its possible they gave me a non Apple powerbrick or perhaps its just faulty.
     
  6. Barney63 macrumors 6502a

    Barney63

    Joined:
    Jan 9, 2014
    Location:
    Bolton, UK.
    #6
    I think you can tell if it is a genuine PSU by watching the LED on the magsafe.
    When you connect the magsafe it should be green for a second or so before going to amber (this is if the battery needs some charge). It is a safety feature of the magsafe so it doesn't supply power until it knows it is correctly connected.


    Barney
     

Share This Page