Blank boot on macbook (Late '06, black) - potential logic board fault?

Discussion in 'MacBook' started by Lit Up*, Aug 18, 2010.

  1. Lit Up* macrumors member

    Aug 18, 2010
    Hey folks, after using a PC laptop for six months or so (and it really messing with my eyesight) I thought I'd try to revive my old macbook. Basically 70/80% of the time it won't turn on. There are these patterns of faulty behaviour which I hope you guys could diagnose:

    1. I'll press the power button, I hear the disk noise, and the screen is black (ie not a backlight problem). The chime won't sound, I can just hear the fan and the harddive whirring. The only way to get out of this is to power it off via the power button.

    2. Sometimes after it's started up successfully and I move the macbook (say, from a desk to my lap) the same thing will happen - black screen, with the rest of the stuff whirring, and if I try to shake it around nothing happens, I have to power off.

    3. Occasionally when I power on, I just get the disk noise, a white screen, but no question mark, no apple logo, nothing.

    4. Another time I tried to boot up with an external harddrive fitted and just got the chime over and over and over. Removing the drive solved this.

    5. One time the screen just greyed out and a message in about 5 languages came up saying I needed to shut down my computer NOW.

    This is NOT a harddrive fault - I saw that apple had extended the warranty on the harddrive because the question mark usually pops up for half a second at startup, and the nice guys at regent st London just whacked a new harddrive in, with a clean install of leopard (which was cool, I was previously on tiger at the time).

    I read something about resetting the PRAM (which I haven't tried), but I'm guessing it's the logicboard/motherboard. If this is the case, any idea how much it costs to fix? (My macbook is out of warranty). Figures in £GBP appreciated but I can convert USD estimates. Is there any way I can try to blag a free motherboard and install from apple by exaggerating some symptoms? If you think it's any other hardware problem, I'd love to know. Thank you for your help!


    PS I really hope it isn't FUBAR as I can't afford a new computer at this time.
  2. Blondie :) macrumors 6502a

    Blondie :)

    May 12, 2010
    Prescott, AZ
    My guess is that it's probably your motherboard man. The same type of thing happened to our old compaq laptop we had many many moons ago. It would never start up, until you'd click the power button about a hundred times and played with the power adapter cord. It would also do really weird things occasionally when we would move it (stop working, shut off, screen black) and such. Eventually we had to get a new computer, unfortunately, because we would have had to upgrade nearly everything in order to replace the motherboard...
  3. skorada123 macrumors newbie

    Jul 28, 2009
    From what you seem to say happens, it does sound like a faulty logic board. I've seen that they might range anywhere from around $500-$900ish based on how you get it replaced. Third-party replacements are often cheaper, and I guess you could also look it up on Ebay. Apple, of course, is on the higher end of the price range. Best to call up Apple and ask them.

    Good luck!

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