Chosen Solution
There are a lot of similar questions out there but I have not been able to find a good answer… On start up, 10-15 seconds after I hear the chime my MacBook Pro shuts down. I’ve removed the bottom case and observed the following: A ton of dust which I removed; No help.Both fans kick in on start up but then everything shuts down. This is both with battery and power adapter. I removed the battery and tried with just power adapter; same thing.I had upgraded the RAM several years ago so I swapped out the newer RAM and installed the original RAM; still the same thing. I’m suspecting the logic board… Unless there is something else I can try. I was thinking that if I have to replace the logic board to upgrade from a 2.66 to a 3.06 GHz (from what I’ve been able to gather this can be done. I’m also thinking of upgrading the Hard Drive (or hybrid) to a larger capacity or go with a SSD drive.
Unless it’s been done earlier, but the ton of dust you mentioned makes me think otherwise, you’ll need to replace the thermal paste which is most probably dried out and useless to dissipate heat. The 10/15 seconds seems a bit of a short time for thermal protection shutdown, but nonetheless that’s the simplest and cheapest thing to try in my opinion.
