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!