Caps Lock light keeps blinking randomly

Discussion in 'MacBook Pro' started by yarjarrar, Jul 15, 2010.

  1. yarjarrar macrumors member

    Jul 2, 2008
    I've noticed that my caps lock light keeps blinking randomly. It usually happens in groups of blinks every 5 minutes or so. It started doing this after I upgraded to snow leopard. Why is it doing this?

    Early '08 MBP
    2.4 GHz
  2. niuniu macrumors 68020


    Mar 29, 2009
    A man of the people. The right sort of people.
    Oh yeah, the self destruct countdown. Three day timer, probably a good time to sell.

    Kidding obv, no idea what it is :)
  3. ano0oj macrumors 6502

    Apr 20, 2010
    maybe your computer is talking to you through morse code
  4. Marbule macrumors newbie

    Jan 8, 2011
    Same problem

    I noticed the same problem today. I have the same machine as the original poster. I did recently upgrade to Snow Leopard, but I don't know if that's really the problem.

    Any results on this issue? Is is still a problem?

    I've noticed some coincident problems, like the trackpad and keyboard freezing completely for a few seconds, and the spacebar typing by itself (spaces appear where I'm typing, but I'm not touching the spacebar). All of the problems are intermittent.
  5. AlphaDogg macrumors 68040


    May 20, 2010
    Boulder, CO
  6. Kenndac macrumors 6502


    Jun 28, 2003
    System Preferences -> Keyboard -> Keyboard tab -> Modifier Keys...

    Is anything other than Caps Lock set to be Caps Lock? If so, pressing that key will cause Caps Lock (and the light) to toggle.
  7. Marbule macrumors newbie

    Jan 8, 2011
    Thanks for the suggestions. It happens while I'm just looking at the keyboard, not typing anything. So it can't be some other key triggering caps lock. I checked the modifier keys to be sure and everything is set normally.

    If the topcase is defective, does it seem likely that my computer will be completely unusable soon?
  8. Leet Apple macrumors 6502a

    Leet Apple

    Nov 10, 2009
    LMAO at both those comments

    Take in to Apple?
  9. megaaaaatron macrumors newbie

    Dec 5, 2012
    This happened to me as well, In my case, it was the battery. When the battery gets old it begins to swell, and the swelling causes a number of annoying side effects, like random clicking (battery presses on trackpad and click button), as well as pressing on caps lock key, and space bar. I haven't had the money to get a new battery yet, and so have been using my Mac with just the power adapter. Somewhat annoying because if I unplug it by accident it dies immediately, but much less annoying than the random clicking all over the place. Hope this helps someone!
  10. Marbule macrumors newbie

    Jan 8, 2011
    Thanks for the reply. I guess I should have made an update on what happened. I took my computer to an Apple store. The battery was dead, and they replaced it for me. This solved my problem, for a year. Now the problem has come back, with a vengeance. Zapping the PRAM sometimes fixes it for a while, but eventually the trackpad and keyboard just stop working completely. Now I just always use an external keyboard and mouse.
  11. Good Karma macrumors newbie

    Nov 17, 2012
    London UK

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