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Macbook Pro chimes and then switches off at boot

Posted on 2014-04-10
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Last Modified: 2014-04-21
Hi

I have a Macbook Pro (MC374LL/A) which won't boot anymore

I followed the recommended steps in the following link here but wasn't able to obtain any imrovement

1) Safe boot doesn't work

2) Reset the NVRAM / PRAM doesn't work

3) Start up your Mac while holding the C key doesn't work

  The DVD I manage to enter is immediately ejected

On each boot the grey screen lasts barely two seconds before the MBP switches itself off

Any ideas ?

thanks
yann
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Question by:Yann Shukor
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12 Comments
 
LVL 25

Expert Comment

by:Tony Giangreco
ID: 39991422
0
 

Author Comment

by:Yann Shukor
ID: 39991441
Yep, saw that, and tried but no improvement
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LVL 53

Expert Comment

by:strung
ID: 39992792
Try booting in verbose mode by holding down command-v and make a note of any error messages.
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Author Comment

by:Yann Shukor
ID: 39992836
unfortunately this has no effect
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LVL 25

Expert Comment

by:Tony Giangreco
ID: 39992851
Check the system event log
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Author Comment

by:Yann Shukor
ID: 39992856
How do you check this if the MBP won't boot ?
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LVL 53

Expert Comment

by:strung
ID: 39992903
What happens when you boot holding down command-v? Does anything appear on the monitor at all?
0
 

Author Comment

by:Yann Shukor
ID: 39992905
nope, nothing different
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LVL 53

Expert Comment

by:strung
ID: 39992939
Sounds like a hardware problem to me.
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Accepted Solution

by:
Yann Shukor earned 0 total points
ID: 39996115
Thanks for all your help and suggestions

Finally, I took the logic board out and cleaned the large amounts of dust,

removed the radiator and cleaned (all) the excess cooling paste

Treated both sides to a clear vinegar tooth brush cleanup

Reassembled and, guess what ? It works !!!
0
 

Author Closing Comment

by:Yann Shukor
ID: 40012211
I have chosen this solution because it is the one that ultimately resolved the situation in the most cost effective and efficient manner.
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