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Macbook Pro chimes and then switches off at boot

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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Yann Shukor
Asked:
Yann Shukor
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1 Solution
 
Tony GiangrecoCommented:
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Yann ShukorOwnerAuthor Commented:
Yep, saw that, and tried but no improvement
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strungCommented:
Try booting in verbose mode by holding down command-v and make a note of any error messages.
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Yann ShukorOwnerAuthor Commented:
unfortunately this has no effect
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Tony GiangrecoCommented:
Check the system event log
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Yann ShukorOwnerAuthor Commented:
How do you check this if the MBP won't boot ?
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strungCommented:
What happens when you boot holding down command-v? Does anything appear on the monitor at all?
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Yann ShukorOwnerAuthor Commented:
nope, nothing different
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strungCommented:
Sounds like a hardware problem to me.
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Yann ShukorOwnerAuthor Commented:
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 !!!
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Yann ShukorOwnerAuthor Commented:
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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