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I have a MacBook Pro mid 2009 that crashes during startup after the chime and once in a blue moon gets as far as the login screen before crashing.

Crashes during safe reboot or recovery reboot too

Hardware test from original cd works but finds nothing wrong Smc reset changes nothing

I have another 2009 MacBook Pro and on interchanging them the following parts work fine

Hard drive Logic board MagSafe port Heatsink Fan Sata cable Battery Ram

Any ideas for tests or parts to check that might be able to crash the whole computer during startup would be appreciated!

  • Try booting in verbose mode (Cmd-V) and see what is causing errors, if any. Also, try running Apple Hardware Test (AHT). Hold the D key while booting from a powered off state with the AC adapter connected. Run the extended tests. Post your results to the original question. – Allan Jul 18 '16 at 14:29
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Try an Apple Hardware Test by holding down the D key: https://support.apple.com/en-us/HT201257

We're looking for long answers that provide some explanation and context. Don't just give a one-line answer; explain why your answer is right, ideally with citations. Answers that don't include explanations may be removed.

  • This is not an answer and should be posted as a comment. – Allan Jul 18 '16 at 14:28

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