11 Replies Latest reply: Apr 13, 2009 6:14 PM by droscarguerrero
cumhurjay Level 1 (0 points)
my macbook does not turn on, only thing i can see is a kind of flash on the screen when i press the power button and hear the zzzzz sound for one second from the disc drive and that's it. and it turns off...is anyone have an idea of whats happening to my macbook. many thanks
  • Krag Level 2 (240 points)
    is it plugged in properly and has the battery been charged?

    you might have to visit the apple store or call apple tech support.
  • cumhurjay Level 1 (0 points)
    the battery is full, had connected and adapter is fully working,,tried on another macbook..done every step of apple suggestions such as reset the computer by taking battery out and holding down power button for 10 secs, no help. (commandoption+pr) no way, ctrloptionpower did not do anything..looks like helpless..
  • Lyssa Level 6 (17,825 points)
    Do you have your install discs with you? If so, put Install Disc 1 into the optical drive and try booting the computer while holding the C key.

    If you don't have your discs, boot the computer while holding the Option key and see if your hard drive appears.

  • mike_appleby Level 1 (0 points)
    Well, my computer is doing something similar. There is a momentary screen flash and I can hear the hard drive spin up, but unless the power cord is plugged in, it powers down after about 5-10 seconds. However, if the power adapter is connected, the machine will eventually boot, but it takes around 30 mins! During this time, the screen is black and there are no external signs of life. Are you sure the machine is powering down? If you can hear the hard disk spinning (put your ear against the facing below the keyboard and to the right of the trackpad), then just let it sit with power connected and see if it comes on.
  • cumhurjay Level 1 (0 points)
    does not boot even after 2 hours..many thanks.
  • DazFM Level 1 (0 points)
    I know, this is generally the last thing you want to hear, but I am having the exact same problem and I don't know what's causing it. I have read quite a lot of these forum posts now and although people are helpful as usual, they just don't seem to get the point that we're not getting as far as the machine trying to look for the hard drive or anything. I'm afraid I don't know as much about macs as I do about PCs, so to put it in PC terms, it seems to be a problem with the bios (I guess that's the EFI in Macs). Pressing cmd + opt etc doesn't work and I guess that's because we haven't gone far enough into the boot cycle for those key-presses to register. The only other thing I've read that seems to make any sense is that since the sleep light is on, then perhaps the machine thinks the lid is closed and powers-up straight to sleep mode.
  • discounteggroll Level 1 (85 points)
    if you are comfortable getting to your RAM, try pulling the RAM chip from the outer RAM slot (take battery out, take access door out, slide the lever door for RAM that is the further of the 2 from the center of the computer) and try booting it again.

    it could be a bad logic board or bad RAM. If it does boot normally, turn the computer off, and pull the RAM chip that's in the inner slot and place it in the now vacant outer RAM slot. that will isolate whether it's the RAM or RAM slot (to be absolutely certain you can then try putting the original outer RAM chip in the inner RAM slot and boot).
  • DazFM Level 1 (0 points)
    For the benefit of anyone else looking for answers here, I'm afraid I now have substantial reason to believe that my motherboard is fried.

    In fact, I would now suggest that if you find *absolutely nothing* happens when you press the power button except perhaps a very brief flash of the screen (the sleep light may also light up and you may eventually hear the fan whirring before the MacBook powers-off completely), then it's looking likely that your motherboard is fried (though I am no expert).
  • pOpgarbage Level 1 (0 points)
    mine just started doing it. if i take the battery out completely and run it off the power adaptor, it will power on. glad to know others are having this issue.
  • PierreUK Level 1 (0 points)
    I have a very similar problem. I left my macbook on sleep last night with the power adaptor charging.

    When I tried turning it back on nothing happened. I followed all the different steps (Ctrl Apple Power..ect) I removed the battery and try to reset the SMC...ect nothing happens.

    The battery is fully charged but for some reason the light on the macsafe adaptor was not coming on as well.

    I tried then to plug this Macbook's charger to a friend's Macbook and it was not working either. His charger was working with his Macbook so I tried to plug it to mine and the green light came on for a second and disappeared. Now his charger doesn't work anymore on his macbook! After that I dont want to thik of trying my battery in his laptop!

    To summarize my macbook has a fuly charged battery that always worked very well (its a year old but was still lasting 2 or 3 hours). It doesn't go on, doesn't make any noises or respond to anything and it fries chargers!

    There must be a false connection inside somewhere. I don't think it's the ram as the other power adaptor died instantly while plugging it to the macbook.

    My warranty ran out a month ago so it's making it even worse!!!!!

  • droscarguerrero Level 1 (0 points)

    I have exactly the same problem as you. I have a macbook black, 10 months old, and eventually turned off. No light at all. I tried to connect the adaptor but no light, and my battery is fully charged. Today i leave it at the macstore and ask me to wait 2 days for the diagnosis.

    any opinion?