Results 1 to 8 of 8
  1. #1
    Macbook restarts itself only when plugged in to power

    Member Since
    Oct 19, 2011
    Posts
    11
    Macbook restarts itself only when plugged in to power
    Hello everyone,

    I am new to this forum so forgive me if this has been asked before. I have searched but I can't find an answer to my problem anywhere.

    Here is the scenario:

    I have a Macbook 3,1 Late 2007 edition with 2GB RAM and a 250GB HDD, CPU Intel Core 2 Duo 2.2Ghz. I bought it used and I bought a non-Apple Magsafe adapter. All was fine for months but now for some odd reason it reboots itself shortly after I login and it only happens when it is plugged in with the magsafe adapter. It does this from MAC OS X and Windows 7 on my BOOTCAMP partition.
    If it runs on the battery, it has NO problems and it stays on until the battery is depleted.

    What I have tried:

    I tried to reset the PRAM no success.
    I tried to reset the SMC by pulling the battery out and holding the power button for 5 seconds no success.
    Thinking that it was a bad power adapter, I borrowed another one from a friend and no success. Problem still persists.
    The only thing I have done last was to upgrade the hard drive from the factory default 160GB 5400RPM to a 250GB 7200RPM.

    I have also tried to download the latest SMC firmware but all of them show a message "It is not needed on this computer" when I try to install.

    Any other ideas what else it could be? It is driving me nuts!!

    Thank you for all your help.

    Joe Matarazz

  2. #2
    Macbook restarts itself only when plugged in to power

    Member Since
    Aug 27, 2010
    Location
    South Korea
    Posts
    41
    You said that you bought a non-Apple Magsafe adapter; was your friend's adapter an Apple Magsafe?

    If so, you might have a bad power supply.

  3. #3
    Macbook restarts itself only when plugged in to power

    Member Since
    Oct 19, 2011
    Posts
    11
    Quote Originally Posted by josephmccutchen View Post
    You said that you bought a non-Apple Magsafe adapter; was your friend's adapter an Apple Magsafe?

    If so, you might have a bad power supply.
    Yes, my friend's adapter was an original Apple Magsafe and it did the same thing. Booted into MAC OS X and shortly after, the screen goes suddenly black and then it starts up like I just powered it on.

    Here is an interesting extra piece of information. I pulled the battery out (Also a non original Apple) and left the laptop powered on with the non Apple magsafe. It seemed OK for a while. I then put the battery back in and booted in single user mode and left it alone for a while. No problem, no reboot.

    I re-seated the memory just for kicks and it hasn't rebooted so far. I will keep it on that way some extra time today...

    Don't think it is the power adapter since it did the same thing with a Apple and non Apple type.

  4. #4
    Macbook restarts itself only when plugged in to power

    Member Since
    Aug 27, 2010
    Location
    South Korea
    Posts
    41
    Hmmmmm...... Perhaps it's a bad battery? You could try swapping batteries and see what happens then. I would try that. Also, if you have easy access to your friend's adapter, you could using it w/o the battery, and see what happens.

  5. #5
    Macbook restarts itself only when plugged in to power

    Member Since
    Oct 19, 2011
    Posts
    11
    Quote Originally Posted by josephmccutchen View Post
    Hmmmmm...... Perhaps it's a bad battery? You could try swapping batteries and see what happens then. I would try that. Also, if you have easy access to your friend's adapter, you could using it w/o the battery, and see what happens.
    Interesting isn't it? I actually have had it running for an hour with the adapter and battery that were giving me the problem. Now here is the diff. the battery shows 100% changed and it is not charging. I will let it run on battery for a while and then plug the magsafe in. If it reboots, I think you may be right. The battery causes issues when charging. Will post soon....

  6. #6
    Macbook restarts itself only when plugged in to power

    Member Since
    Aug 27, 2010
    Location
    South Korea
    Posts
    41
    MacBook late 2007; that's what I used to have. If it is the battery that's causing the problem, at least it's easy to replace! i have a mid-2010 MacBook Pro unibody; no, the battery isn't hard to replace, just a little more work, and Apple saying don't do it. Looking forward to your post as to what happens!

  7. #7
    Macbook restarts itself only when plugged in to power

    Member Since
    Oct 19, 2011
    Posts
    11
    Wow, now I am even more confused than before. I let the battery discharge to 50% and the plugged in the Magsafe adapter (non-Apple one). The macbook has been running for the past hour, I ran updates, installed stuff, etc. Still ON.

    I guess it boils down to 2 things: 1) Re-seating the memory modules. or 2) Re-seating the battery (non-Apple).

  8. #8
    Macbook restarts itself only when plugged in to power
    chscag's Avatar
    Member Since
    Jan 23, 2008
    Location
    Fort Worth, Texas
    Posts
    45,194
    Specs:
    27" iMac i5, 3.2 GHz, iPad 3, iPhone 5c, iPhone 6+, 3 iPods, Yosemite
    For general information: Sudden reboots are usually caused by one of two things: Bad memory, or power supply. So perhaps you've zeroed in on the problem.

Thread Information

Users Browsing this Thread

There are currently 1 users browsing this thread. (0 members and 1 guests)

Similar Threads

  1. Macbook hangs when power cable unplugged or plugged in
    By chuvak in forum Apple Notebooks
    Replies: 2
    Last Post: 03-04-2014, 02:25 PM
  2. Replies: 11
    Last Post: 07-27-2013, 01:20 PM
  3. Replies: 8
    Last Post: 06-29-2011, 02:30 PM
  4. Power Always Plugged In !!
    By mohdhtc in forum Apple Notebooks
    Replies: 3
    Last Post: 11-20-2010, 02:13 PM
  5. Macbook boots as soon as plugged into power
    By golfpro65 in forum Apple Notebooks
    Replies: 9
    Last Post: 07-18-2008, 12:55 AM

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •