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Apple Notebooks Apple's notebook computers including MacBook Pro, MacBook, MacBook Air, PowerBook, and iBook.

MacBook - macbook will not turn on, logic board?


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tjfitz7

 
Member Since: Jul 01, 2009
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Hello,

This is my first time posting anything, I believe Im in the right place but sorry if Im not. I am having trouble with my macbook, I came home from work was real busy and it ended up sitting in my laptop bag for 2 days before I took it back out, unfortunately I was an idiot and forgot to shut it down too, needless to say when I finally took it back out of my bag the battery was dead, I plugged it in and tried to turn it on but I got nothing, the power indicator light comes on but the HDD does not boot up nor does the fan turn on, nothing happens. Ive tried everything I could find on apple's site, and anything I could find doing google searches and nothing is working. From what ive read it sounds like its the logic board. Has anyone had a problem like this, can anyone tell me if it is the logic board, or if theres a way to diagnose this, I am capable of replacing it myself but i want to make sure thats what it is. I dont want to take it to apple and be charged ridiculous repair fees (out of warranty) so any help would be greatly appreciated, thanks.
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cwa107

 
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Does the machine turn on with the battery removed?

Liquid and computers don't mix. It might seem simple, but we see an incredible amount of people post here about spills. Keep drinks and other liquids away from your expensive electronics!
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tjfitz7

 
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No, it does not turn on with the battery removed, also I figure I should mention Ive tried swapping the RAM out, and I pulled the harddrive put it in a external adaptor and booted from it on my desktop with no problem so I know the harddrive is fine.
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cwa107

 
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Did you reset the SMC?

Apple Portables: Resetting the System Management Controller (SMC)

Liquid and computers don't mix. It might seem simple, but we see an incredible amount of people post here about spills. Keep drinks and other liquids away from your expensive electronics!
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tjfitz7

 
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yeah, I tried reseting the SMC and the PRAM
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cwa107

 
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It certainly sounds like a bad logic board then. If you want to replace it yourself, you can get parts and instructions from iFixit: iPod, iBook, & PowerBook Parts and Accessories.

Liquid and computers don't mix. It might seem simple, but we see an incredible amount of people post here about spills. Keep drinks and other liquids away from your expensive electronics!
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tjfitz7

 
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thanks for the input, I figured thats what it was but thought id put it out there in case there was and easy fix.
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dkennedy

 
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same here...my logic board went out in May...I returned it to the Apple Store...this is the 2nd logic board on my 17" MBP and to my surprise after the last repair Apple has removed my serial number from their computers, so the Genius at the Apple store couldn't create a ticket...I called Apple and now they require my original receipt (from the same store) stating that my MBP is out of warrany and I would need to pay a flat rate (which I knew)...anyways...to make this story short...Apple is researching why my serial number was removed from their computers...the Mac Genius feels it was re-serialized after the last logic board replacement...meanwhile...I have a paperweight...until they resolve the issue...which is 2 months and counting...
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trinimac

 
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I am not sure if this is at all relevent to your situation but I have recently got a dead G4 Titanium powerbook to start again after being a paperweight for a while with the help of the people on here.

The problem on mine was the cmos battery was totally dead and it was this that was stopping the machine from starting. Unplugging it allowed the machine to start and after rebooting and shutting down a few times I reconnected the battery and it now works fine.

The thread for my query was still on the first page of this section under the title of Dead G4 Titanium powerbook.

http://www.mac-forums.com/forums/app...powerbook.html

Like I said, not sure this is relevent but it may just be the solution (hoping for you).

Trinimac.
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manning28addai

 
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deffenly sounds like a bad logic board umm just wondering when you had it in your bag for a couple of days was asleep or running in the bag because if was you could of fried the logic board also do you get the mac chime when your tuen it on ???
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Collin Bl

 
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Quote:
Originally Posted by manning28addai View Post
deffenly sounds like a bad logic board umm just wondering when you had it in your bag for a couple of days was asleep or running in the bag because if was you could of fried the logic board also do you get the mac chime when your tuen it on ???
and the Logic board would be fried because? Not sure i understand what u are saying.
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tjfitz7

 
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first thanks for all the replies and thanks to trinimac for the the tip unfortunately that is not the case.. to manning28addai no it was not asleep, it was running, no I get no chime or any kind of sound at all... Im certain at this point I have to replace the logic board which is what I figured was the case but I thought I would get some input, always best to rule out the easy fixes first.. and to answer your question collin Bl, it isnt fried in the conventional sense, but the processor chips will become damaged if they overheat with no visible damage, entrapped in an enclosed space like that even with the heatsink and fan it only goes so far.. like I said I figured thats what happened but wanted to rule out any simple stuff before I bought a new board and tore my computer apart..
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