Previous 1 2 3 Next 36 Replies Latest reply: Aug 10, 2007 4:18 AM by sierragoddess
Lopi Level 1 Level 1 (0 points)
When my MBP is plugged in I get an electric vibration (mild shock) feeling. Sometimes, when typing, I will get a painful shock from just above the disk drive. This mild electric vibration occours simultainously with the hissing sound other users are hearing. I know im not out of my mind because when other people are touching my computer I can touch them and feel the same feeling. I can actually create a chain of a few people to recieve this sensation. I have enabled photobooth (as read in other forums) which stops it , but this does not seem like a solution but more of a quick fix. Does anyone know if apple plans on doing anything about this other than replacing computers (ie. software update?) because I have too much work to wait around on a replacement.

Mac Book Pro   Mac OS X (10.4.6)  
  • Peter K. Grether Level 4 Level 4 (2,870 points)
    If you do a search under Macbook Pro shock, you will find plenty of threads and posts.
  • William Kane Level 1 Level 1 (60 points)
    I hate to rain on your parade, but this sounds like an electrostatic charge/discharge to me. If you can chain several people together and still create a charge we are talking about some serious voltage leak(s) here. I do an experiment like this with a van der graff generator with my students.

    My mind sees no good way to fix this with software, it will likely require a hardware fix. If I recall correctly some people are using the 3 prong plug to fix this problem. Others have simply returned as defective.
  • Peter Moyer Level 4 Level 4 (1,350 points)
    As mentioned in other threads, try using the 3-pronged plug cord with your power brick instead of directly plugging the brick into the power source. See if this helps you out.
  • a brody Level 9 Level 9 (65,090 points)
    Welcome to Apple Discussions!
    In addition, whenever it has been very dry you build up static charge. This is especially true walking across carpeted rooms. If the desk is anchored to the floor, touch the desk before touching the computer when you sit down to work at the computer. That will dissipate charge you may have built up.

    I once had a very embarrasing moment, walking across a wet floor with carpet, and touched the keyboard of a computer. The computer started to smoke, and I heard snap crackle pop! It had to have a capacitor replaced which had popped.
  • Blacklily Level 1 Level 1 (0 points)
    mine was doing that too. it only does it with the 2 prong plug. Once i use 3 prong the ground is no longer me. this is an issue because I would like to be able to use the 2 prong plug when traveling. Its definitely a hardware issue obviously. Anyone get any response from apple about this?
  • Lopi Level 1 Level 1 (0 points)
    So... I have tried the 3 pronged cord. It is not static electricity this is obviously being generated in my computer.I have also tried many other things such as using a power strip for only the computer. Apple has not responded to me yet and I have found no other forums on this. If anyone knows of any could you please leave a link for me.
  • mahepecha Level 1 Level 1 (25 points)
    unfortunately, this thread: got lost but it deals with the same issue and mentions some corelation with firewire devices...

  • Rishi Level 1 Level 1 (5 points)
    Hello Friends,

    I purchased a MacBook Pro 15.4" 1.83 last Tuesday, the day they released MacBooks and I am having similar problems.

    I get mild electric shocks from my MBP when it is being charged. There were heat/whine issues as well but they got resolved after I ran the lastest firmware updates.

    This shocks remain the only irritation.When I run the computer while charge I can feel some 'humming' vibration near the mouse where I place my palms. When I place a finger I get mild shocks but when I move it in circular direction then I can feel a vibration.

    I tried the three pronged switch without any result.I tried my iBook using same power supply with surge protector and did not have any problems with it.
  • MacInja Level 1 Level 1 (0 points)
    mate, any electrical shocks are not normal.

    get it checked by apple care or a servive provider !!

    dont trade off your safety
  • mdhaem Level 1 Level 1 (0 points)
    I receive a mild electrical shock from the lower case of my Mac Book Pro while plugged in using the two prong plug. However, when I use the three prong plug the problem goes away. When I switch back to the two prong plug the problem is still gone. Could this be a the result of a static charge buildup with prolonged two prong plug use?
  • Niel Level 10 Level 10 (289,725 points)
    Your problem is that charge is building up inside the computer. When the two-prong plug is connected, the charge doesn't have anywhere to go, so it remains on the machine. The third prong on a three-prong plug is designed to transfer excess charge from the computer's case to the ground; it also works with other machines, such as a washing machine. When you touch the case after a charge has built up, it will flow through you to the ground; if the charge is small enough, you won't notice it. Large enough charges can injure someone who touches the machine's case; if someone is wet, the effect will be much larger for the same amount of charge.

  • Lopi Level 1 Level 1 (0 points)
    I have been using the 3 prong plug. I still get the juice!
  • xrays Level 1 Level 1 (0 points)
    I'm in Singapore and it's really humid here. Also using the earthed plug, so there's no "electric-shock" feeling.

    However, I get minor tingles when it's on batteries. Especially in dry air-conditioned rooms.
  • Jackthequick Level 3 Level 3 (640 points)

    the weak electric voltage that is noticeable on the surface of the MacBook Pro occurs because of the voltage frequency of the power supply. This dysfunction also happened with PowerBook models.
    The low tension is nothing to be concerned about as long as it doesn't become stronger as you described.
    The vibration stops when the supply is unplugged and the laptop is powered by its battery.
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